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Employee Benefits (Details) (USD $) | 12 Months Ended
--- | ---
Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Employee Benefits [Abstract] |  |  |
Number of retirement savings plan | 2 |  |
Minimum age of employees to participate in plan | 21 years |  |
Minimum requisite service period to participate in retirement plans | 1 year |  |
Minimum annual working hours required to participate in plan | 1,000 |  |
Percentage of employee contribution, Minimum (in hundredths) | 1.00% |  |
Percentage of employee contribution, Maximum (in hundredths) | 15.00% |  |
Employer matching contribution (in hundredths) | 50.00% |  |
Maximum contribution on employees gross pay (in hundredths) | 4.00% |  |
Contribution by employer under 401(K) plan | $ 1,000,000 | $ 900,000 | $ 900,000
Number of allocated shares under 401 (K) plan (in shares) | 501,388 | 531,361 | 507,932
Annual contribution percentage under ESOP (in hundredths) | 4.00% |  |
Contributions to ESOP by employer | 1,400,000 | 1,400,000 | 1,300,000
Number of allocated shares under ESOP (in shares) | 680,613 | 661,691 | 647,158
Stock Ownership Incentive Plans [Line Items] |  |  |
Number of shares transferred from one plan to another plan (in shares) | 198,024 |  |
Black-Scholes option pricing model, weighted average assumptions [Abstract] |  |  |
Expected option life |  |  | 7 years 6 months
Expected volatility (in hundredths) |  |  | 39.10%
Expected dividend yield (in hundredths) |  |  | 4.78%
Risk-free interest rate (in hundredths) |  |  | 3.139%
Stock-based compensation expense | 600,000 | 700,000 | 800,000
Dividends paid on restricted stock shares | 121,000 | 120,000 | 74,000
Weighted Average Exercise Price [Abstract] |  |  |
Outstanding at beginning of year (in dollars per share) | $ 33.02 | $ 32.36 |
Outstanding at end of year (in dollars per share) | $ 38.95 | $ 33.02 | $ 32.36
Options Outstanding Remaining life |  |  |
Weighted Average Exercise Price (in dollars per share) | $ 38.95 | $ 33.02 | $ 32.36
Unrecognized compensation cost related to nonvested awards grant date fair value of vested shares and tax benefit realized from option exercises [Abstract] |  |  |
Unrecognized compensation cost of unvested share-based compensation arrangements granted under the plan at year-end | 1,133,000 | 1,729,000 | 990,000
Grant date fair value of shares vested for the year | 34,000 | 284,000 | 719,000
Cash received from option exercises under all share-based payment arrangements for the year | 3,137,000 | 134,000 | 672,000
Tax benefit realized for the tax deductions from option exercises of the share-based payment arrangements for the year | 496,000 | 23,000 | 205,000
Expected period for recognition of unrecognized compensation cost | 1 year 6 months |  |
Stock Options [Member] |  |  |
Options vested and expected to vest [Abstract] |  |  |
Number of Shares to Be Issued Upon Exercise/Vesting (in shares) | 326,000 |  |
Weighted Average Price (in dollars per share) | $ 32.64 |  |
Options Outstanding Remaining life |  |  |
Accelerated vesting of share based awards approved (in shares) |  | 5,215 | 3,750
Accelerated vesting of share based awards approved price (in dollars per share) |  | $ 38.95 | $ 28.32
Restricted Stock [Member] |  |  |
Stock Ownership Incentive Plans [Line Items] |  |  |
Shares authorized (in shares) | 400,000 |  |
Options vested and expected to vest [Abstract] |  |  |
Number of Shares to Be Issued Upon Exercise/Vesting (in shares) |  |  |
Weighted Average Price (in dollars per share) |  |  |
Maximum number of shares to be grant to a participant (in shares) | 40,000 |  |
Nonvested/Outstanding shares [Roll Forward] |  |  |
Nonvested/Outstanding (in shares) | 96,543 | 52,834 | 16,786
Granted (in shares) | 331 | 45,542 | 44,996
Exercised (in shares) | 0 | (1,617) | (4,474)
Forfeited (in shares) | 0 | (216) | (4,474)
Nonvested/Outstanding (in shares) | 96,874 | 96,543 | 52,834
Nonvested/Outstanding, Weighted Average Grant Date Fair Value [Roll Forward] |  |  |
Nonvested/Outstanding (in dollars per share) | $ 27.91 | $ 26.10 | $ 28.83
Granted (in dollars per share) | $ 30.92 | $ 30.09 | $ 25.09
Exercised (in dollars per share) | $ 0 | $ 30.09 | $ 26.14
Forfeited (in dollars per share) | $ 0 | $ 30.09 | $ 26.14
Nonvested/Outstanding (in dollars per share) | $ 27.92 | $ 27.91 | $ 26.10
Options Outstanding Remaining life |  |  |
Accelerated vesting of share based awards approved (in shares) |  | 1,617 | 4,474
Accelerated vesting of share based awards approved price (in dollars per share) |  | $ 30.09 | $ 26.14
Performance Shares [Member] |  |  |
Options vested and expected to vest [Abstract] |  |  |
Number of Shares to Be Issued Upon Exercise/Vesting (in shares) |  |  |
Weighted Average Price (in dollars per share) |  |  |
Maximum amount of shares to be grant to a participant | 250,000 |  |
Stock Appreciation Rights (SARs) [Member] |  |  |
Options vested and expected to vest [Abstract] |  |  |
Number of Shares to Be Issued Upon Exercise/Vesting (in shares) |  |  |
Weighted Average Price (in dollars per share) |  |  |
Maximum number of shares to be grant to a participant (in shares) | 100,000 |  |
1998 Stock Option Plan [Member] |  |  |
Stock Ownership Incentive Plans [Line Items] |  |  |
Shares authorized (in shares) | 1,046,831 |  |
Options [Roll Forward] |  |  |
Outstanding at beginning of year (in shares) | 321,540 | 371,077 | 420,731
Granted (in shares) | 0 | 0 | 0
Exercised (in shares) | (143,914) | (6,824) | (48,730)
Forfeited/expired (in shares) | (100) | (42,713) | (924)
Outstanding at end of year (in shares) | 177,526 | 321,540 | 371,077
Exercisable (in shares) | 177,526 | 321,540 | 361,077
Weighted Average Exercise Price [Abstract] |  |  |
Outstanding at beginning of year (in dollars per share) | $ 26.85 | $ 27.07 | $ 25.64
Granted (in dollars per share) | $ 0 | $ 0 | $ 0
Exercised (in dollars per share) | $ 21.83 | $ 19.63 | $ 14.66
Forfeited/expired (in dollars per share) | $ 32.44 | $ 29.94 | $ 32.44
Outstanding at end of year (in dollars per share) | $ 30.89 | $ 26.85 | $ 27.07
Exercisable (in dollars per share) | $ 30.89 | $ 26.85 | $ 26.92
Options Outstanding Remaining life |  |  |
Total outstanding (in shares) | 177,526 | 321,540 | 371,077
Weighted Average Exercise Price (in dollars per share) | $ 30.89 | $ 26.85 | $ 27.07
Intrinsic value of options exercised | 690,000 | 27,000 | 627,000
Intrinsic value of exercisable options | 1,517,000 | 833,000 | 1,206,000
Intrinsic value of outstanding options | 1,517,000 | 833,000 | 1,206,000
1998 Stock Option Plan [Member] | Options with remaining life one year or less [Member] |  |  |
Options [Roll Forward] |  |  |
Outstanding at end of year (in shares) | 2,435 |  |
Weighted Average Exercise Price [Abstract] |  |  |
Outstanding at end of year (in dollars per share) | $ 20.99 |  |
Options Outstanding Remaining life |  |  |
Total outstanding (in shares) | 2,435 |  |
Weighted Average Exercise Price (in dollars per share) | $ 20.99 |  |
1998 Stock Option Plan [Member] | Options with remaining life two years [Member] |  |  |
Options [Roll Forward] |  |  |
Outstanding at end of year (in shares) | 34,100 |  |
Weighted Average Exercise Price [Abstract] |  |  |
Outstanding at end of year (in dollars per share) | $ 27.85 |  |
Options Outstanding Remaining life |  |  |
Total outstanding (in shares) | 34,100 |  |
Weighted Average Exercise Price (in dollars per share) | $ 27.85 |  |
1998 Stock Option Plan [Member] | Options with remaining life three years [Member] |  |  |
Options [Roll Forward] |  |  |
Outstanding at end of year (in shares) | 57,849 |  |
Weighted Average Exercise Price [Abstract] |  |  |
Outstanding at end of year (in dollars per share) | $ 30.88 |  |
Options Outstanding Remaining life |  |  |
Total outstanding (in shares) | 57,849 |  |
Weighted Average Exercise Price (in dollars per share) | $ 30.88 |  |
1998 Stock Option Plan [Member] | Options with remaining life four years [Member] |  |  |
Options [Roll Forward] |  |  |
Outstanding at end of year (in shares) | 83,142 |  |
Weighted Average Exercise Price [Abstract] |  |  |
Outstanding at end of year (in dollars per share) | $ 32.44 |  |
Options Outstanding Remaining life |  |  |
Total outstanding (in shares) | 83,142 |  |
Weighted Average Exercise Price (in dollars per share) | $ 32.44 |  |
2006 Stock Ownership Incentive Plan [Member] |  |  |
Stock Ownership Incentive Plans [Line Items] |  |  |
Shares authorized (in shares) | 1,500,000 |  |
Shares available for future grants (in shares) | 1,245,189 |  |
Shares Available for Future Issuance [Abstract] |  |  |
Shares available at January 1, 2012 (in shares) | 1,442,719 |  |
1998 Plan Forfeitures in 2012 (in shares) | 100 |  |
Restricted stock issuances in 2012 (in shares) | (331) |  |
2006 Plan Forfeitures in 2012 (in shares) | 725 |  |
Shares available for future issuance (in shares) | 1,443,213 | 1,442,719 |
Options [Roll Forward] |  |  |
Outstanding at beginning of year (in shares) | 152,571 | 177,125 | 174,678
Granted (in shares) | 0 | 0 | 4,525
Exercised (in shares) | (3,188) | 0 | 0
Forfeited/expired (in shares) | (725) | (24,554) | (2,078)
Outstanding at end of year (in shares) | 148,658 | 152,571 | 177,125
Exercisable (in shares) | 102,323 | 101,092 | 90,962
Weighted Average Exercise Price [Abstract] |  |  |
Outstanding at beginning of year (in dollars per share) | $ 34.57 | $ 34.61 | $ 34.85
Granted (in dollars per share) | $ 0 | $ 0 | $ 25.09
Exercised (in dollars per share) | $ 28.51 | $ 0 | $ 0
Forfeited/expired (in dollars per share) | $ 30.05 | $ 34.84 | $ 33.83
Outstanding at end of year (in dollars per share) | $ 34.72 | $ 34.57 | $ 34.61
Exercisable (in dollars per share) | $ 37.69 | $ 37.81 | $ 37.70
Nonvested/Outstanding shares [Roll Forward] |  |  |
Nonvested/Outstanding (in shares) | 51,479 |  |
Granted (in shares) | 0 |  |
Vested (in shares) | (4,894) |  |
Forfeited (in shares) | (250) |  |
Nonvested/Outstanding (in shares) | 46,335 | 51,479 |
Nonvested/Outstanding, Weighted Average Grant Date Fair Value [Roll Forward] |  |  |
Nonvested/Outstanding (in dollars per share) | $ 6.53 |  |
Granted (in dollars per share) | $ 0 |  |
Vested (in dollars per share) | $ 7.02 |  |
Forfeited (in dollars per share) | $ 7.05 |  |
Nonvested/Outstanding (in dollars per share) | $ 6.48 | $ 6.53 |
Options Outstanding Remaining life |  |  |
Total outstanding (in shares) | 148,658 | 152,571 | 177,125
Weighted Average Exercise Price (in dollars per share) | $ 34.72 | $ 34.57 | $ 34.61
Weighted average fair value of options granted |  |  | 30,000
Weighted average fair value per share of options granted (in dollars per share) |  |  | $ 6.53
Intrinsic value of options exercised | 22,000 | 0 | 0
Intrinsic value of exercisable options | 88,000 | 43,000 | 0
Intrinsic value of outstanding options | $ 388,000 | $ 345,000 | $ 0
2006 Stock Ownership Incentive Plan [Member] | Options with remaining life four years [Member] |  |  |
Options [Roll Forward] |  |  |
Outstanding at end of year (in shares) | 89,746 |  |
Weighted Average Exercise Price [Abstract] |  |  |
Outstanding at end of year (in dollars per share) | $ 38.95 |  |
Options Outstanding Remaining life |  |  |
Total outstanding (in shares) | 89,746 |  |
Weighted Average Exercise Price (in dollars per share) | $ 38.95 |  |
2006 Stock Ownership Incentive Plan [Member] | Options with remaining life five years [Member] |  |  |
Options [Roll Forward] |  |  |
Outstanding at end of year (in shares) | 46,700 |  |
Weighted Average Exercise Price [Abstract] |  |  |
Outstanding at end of year (in dollars per share) | $ 28.32 |  |
Options Outstanding Remaining life |  |  |
Total outstanding (in shares) | 46,700 |  |
Weighted Average Exercise Price (in dollars per share) | $ 28.32 |  |
2006 Stock Ownership Incentive Plan [Member] | Options with remaining life six years [Member] |  |  |
Options [Roll Forward] |  |  |
Outstanding at end of year (in shares) | 7,937 |  |
Weighted Average Exercise Price [Abstract] |  |  |
Outstanding at end of year (in dollars per share) | $ 29.82 |  |
Options Outstanding Remaining life |  |  |
Total outstanding (in shares) | 7,937 |  |
Weighted Average Exercise Price (in dollars per share) | $ 29.82 |  |
2006 Stock Ownership Incentive Plan [Member] | Options with remaining life seven years [Member] |  |  |
Options [Roll Forward] |  |  |
Outstanding at end of year (in shares) | 4,275 |  |
Weighted Average Exercise Price [Abstract] |  |  |
Outstanding at end of year (in dollars per share) | $ 25.09 |  |
Options Outstanding Remaining life |  |  |
Total outstanding (in shares) | 4,275 |  |
Weighted Average Exercise Price (in dollars per share) | $ 25.09 |  |

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- Definition As of the balance sheet date, the aggregate unrecognized cost of equity-based awards made to employees under equity-based compensation awards that have yet to vest. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph h -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition Disclosure of the aggregate tax benefit realized from the exercise of stock options and the conversion of similar instruments during the annual period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (j) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph i -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition The shares or units in an ESOP trust that have been assigned to individual participant accounts based on a known formula. IRS rules require allocations to be nondiscriminatory generally based on compensation, length of service, or a combination of both. For any particular participant such shares or units may be vested, unvested, or partially vested. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 40 -Section 50 -Paragraph 1 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=6418621&loc=d3e17540-113929 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Statement of Position (SOP) -Number 93-6 -Paragraph 53 -Subparagraph d -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(3) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph b(2)(e) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(3) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph b(2)(c) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph c(1) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph b(2)(c) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph b(2)(b) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph b(2)(a) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition The weighted average fair value of nonvested awards on equity-based plans excluding option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, revenue or profit achievement stock award plan) for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares or units. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph b(2)(b) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph b(2)(a) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph b(2)(d) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph b(2)(d) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2)(iii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph e(2)(c) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition Expected term of share-based compensation awards, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 14.D.2) -URI http://asc.fasb.org/extlink&oid=6793087&loc=d3e301413-122809 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 14 -Section D -Subsection 2 + Details
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- Definition The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2)(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph e(2)(b) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition The risk-free interest rate assumption that is used in valuing an option on its own shares. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2)(iv) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph e(2)(d) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition The highest quantity of shares an employee can purchase under the plan per period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph a -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Gross number of share options (or share units) granted during the period. + References No definition available. + Details
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- Definition The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph c(1) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of options outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph d(1) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition The number of shares reserved for issuance under stock option agreements awarded under the plan that validly exist and are outstanding as of the balance sheet date, including vested options. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph b(1)(b) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph b(1)(a) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph b(1)(a) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition The number of exercisable share options (fully vested and expected to vest) that may be converted as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph d(2) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition As of the balance sheet date, the weighted-average exercise price (at which grantees can acquire the shares reserved for issuance) for exercisable stock options that are fully vested or expected to vest. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph d(2) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition Fair value of options vested. Excludes equity instruments other than options, for example, but not limited to, share units, stock appreciation rights, restricted stock. + References No definition available. + Details
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- Definition Weighted average price at which option holders acquired shares when converting their stock options into shares. + References No definition available. + Details
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- Definition Weighted average price at which grantees can acquire the shares reserved for issuance on stock options awarded. + References No definition available. + Details
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