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Stock-Based Compensation (Details) $ / shares in Units, $ in Thousands |  | 12 Months Ended |
--- | --- | --- | ---
Jun. 03, 2013 shares | Dec. 31, 2015 USD ($) Installment Level $ / shares shares | Dec. 31, 2014 USD ($) $ / shares shares | Dec. 31, 2013 USD ($) $ / shares | Apr. 30, 2010 shares
Stock-Based Compensation [Abstract] |  |  |  |  |  |
Stock-based compensation expense (income) | $ |  |  | $ 7,400 | $ 17,504 | $ 32,620 |
Performance-Based Options [Member] |  |  |  |  |  |
Stock-Based Compensation [Abstract] |  |  |  |  |  |
Stock-based compensation expense (income) | $ |  |  | $ (6,400) | $ 5,200 | $ 23,200 |
2010 Omnibus Incentive Plan [Member] |  |  |  |  |  |
Stock-Based Compensation [Abstract] |  |  |  |  |  |
Number of shares authorized for issuance (in shares) | shares |  |  |  |  |  | 7,000,000
Number of additional shares authorized for issuance (in shares) | shares |  | 3,200,000 |  |  |  |
2010 Omnibus Incentive Plan [Member] | Stock Options [Member] |  |  |  |  |  |
Fair Value Assumptions [Abstract] |  |  |  |  |  |
Weighted average grant date fair value of grants (in dollars per share) |  |  | $ 16.26 | $ 23.01 | $ 22.10 |
Risk-free interest rate | [1] |  | 1.70% | 1.70% | 1.40% |
Dividend yield | [2] |  | 2.10% | 1.90% | 3.10% |
Expected volatility | [3] |  | 46.80% | 45.40% | 41.70% |
Expected life in months | [4] |  | 65 months | 62 months | 62 months |
Options [Roll Forward] |  |  |  |  |  |
Outstanding at beginning of year (in shares) | shares |  |  | 5,962,500 |  |  |
Granted (in shares) | shares |  |  | 218,500 |  |  |
Exercised (in shares) | shares |  |  | (720,400) |  |  |
Forfeited/cancelled/expired (in shares) | shares |  |  | (392,200) |  |  |
Outstanding at end of year (in shares) | shares |  |  | 5,068,400 | 5,962,500 |  |
Exercisable at end of year (in shares) | shares |  |  | 2,461,600 |  |  |
Options, Weighted-Average Exercise Price [Roll Forward] |  |  |  |  |  |
Outstanding at beginning of year (in dollars per share) |  |  | $ 50.43 |  |  |
Granted (in dollars per share) |  |  | 44.72 |  |  |
Exercised (in dollars per share) |  |  | 21.11 |  |  |
Forfeited/cancelled/expired (in dollars per share) |  |  | 69.17 |  |  |
Outstanding at end of year (in dollars per share) |  |  | 52.91 | $ 50.43 |  |
Exercisable at end of year (in dollars per share) |  |  | $ 29.10 |  |  |
Outstanding options, weighted-average remaining contractual term |  |  | 3 years 3 months 4 days |  |  |
Exercisable options, weighted-average remaining contractual term |  |  | 1 year 8 months 12 days |  |  |
Options, Additional Information [Abstract] |  |  |  |  |  |
Aggregate intrinsic value | $ |  |  | $ 29,406 |  |  |
Aggregate intrinsic value, exercisable | $ |  |  | 29,369 |  |  |
Fair value of options vested and expensed, net of tax | $ |  |  | 2,800 | $ 4,200 | $ 13,200 |
Cash proceeds from stock options exercised | $ |  |  | 13,041 | 11,042 | 37,869 |
Tax benefit realized for stock options exercised | $ |  |  | 4,451 | 11,947 | 41,914 |
Intrinsic value of stock options exercised | $ |  |  | $ 12,085 | $ 17,159 | $ 241,700 |
Nonvested Restricted Stock Awards, Weighted-Average Grant Date Fair Value [Abstract] |  |  |  |  |  |
Granted (in dollars per share) |  |  | $ 44.72 |  |  |
Unrecognized Stock-Based Compensation Expense [Abstract] |  |  |  |  |  |
Unrecognized stock-based compensation expense | $ |  |  | $ 4,400 |  |  |
Unrecognized stock-based compensation expense, period for recognition |  |  | 2 years 7 months 6 days |  |  |
2010 Omnibus Incentive Plan [Member] | Stock Options [Member] | Minimum [Member] |  |  |  |  |  |
Stock-Based Compensation [Abstract] |  |  |  |  |  |
Contractual term of stock options granted |  |  | 7 years |  |  |
2010 Omnibus Incentive Plan [Member] | Stock Options [Member] | Maximum [Member] |  |  |  |  |  |
Stock-Based Compensation [Abstract] |  |  |  |  |  |
Contractual term of stock options granted |  |  | 10 years |  |  |
2010 Omnibus Incentive Plan [Member] | Service-Based Options [Member] |  |  |  |  |  |
Options [Roll Forward] |  |  |  |  |  |
Outstanding at beginning of year (in shares) | shares |  |  | 1,924,200 |  |  |
Granted (in shares) | shares |  |  | 179,700 |  |  |
Exercised (in shares) | shares |  |  | (545,000) |  |  |
Forfeited/cancelled/expired (in shares) | shares |  |  | (89,200) |  |  |
Outstanding at end of year (in shares) | shares |  |  | 1,469,700 | 1,924,200 |  |
Exercisable at end of year (in shares) | shares |  |  | 1,175,300 |  |  |
Options, Weighted-Average Exercise Price [Roll Forward] |  |  |  |  |  |
Outstanding at beginning of year (in dollars per share) |  |  | $ 29.08 |  |  |
Granted (in dollars per share) |  |  | 42.51 |  |  |
Exercised (in dollars per share) |  |  | 18.14 |  |  |
Forfeited/cancelled/expired (in dollars per share) |  |  | 60.99 |  |  |
Outstanding at end of year (in dollars per share) |  |  | 32.85 | $ 29.08 |  |
Exercisable at end of year (in dollars per share) |  |  | $ 26.68 |  |  |
Outstanding options, weighted-average remaining contractual term |  |  | 2 years 3 months 29 days |  |  |
Exercisable options, weighted-average remaining contractual term |  |  | 1 year 5 months 5 days |  |  |
Options, Additional Information [Abstract] |  |  |  |  |  |
Aggregate intrinsic value | $ |  |  | $ 20,228 |  |  |
Aggregate intrinsic value, exercisable | $ |  |  | $ 20,191 |  |  |
Nonvested Restricted Stock Awards, Weighted-Average Grant Date Fair Value [Abstract] |  |  |  |  |  |
Granted (in dollars per share) |  |  | $ 42.51 |  |  |
2010 Omnibus Incentive Plan [Member] | Performance-Based Options [Member] |  |  |  |  |  |
Stock-Based Compensation [Abstract] |  |  |  |  |  |
Number of installments for vesting | Installment |  |  | 3 |  |  |
Number of established performance levels for vesting | Level |  |  | 3 |  |  |
Options [Roll Forward] |  |  |  |  |  |
Outstanding at beginning of year (in shares) | shares |  |  | 4,038,300 |  |  |
Granted (in shares) | shares |  |  | 38,800 |  |  |
Exercised (in shares) | shares |  |  | (175,400) |  |  |
Forfeited/cancelled/expired (in shares) | shares |  |  | (303,000) |  |  |
Outstanding at end of year (in shares) | shares |  |  | 3,598,700 | 4,038,300 |  |
Exercisable at end of year (in shares) | shares |  |  | 1,286,300 |  |  |
Options, Weighted-Average Exercise Price [Roll Forward] |  |  |  |  |  |
Outstanding at beginning of year (in dollars per share) |  |  | $ 60.61 |  |  |
Granted (in dollars per share) |  |  | 54.97 |  |  |
Exercised (in dollars per share) |  |  | 30.35 |  |  |
Forfeited/cancelled/expired (in dollars per share) |  |  | 71.58 |  |  |
Outstanding at end of year (in dollars per share) |  |  | 61.10 | $ 60.61 |  |
Exercisable at end of year (in dollars per share) |  |  | $ 31.31 |  |  |
Outstanding options, weighted-average remaining contractual term |  |  | 3 years 7 months 20 days |  |  |
Exercisable options, weighted-average remaining contractual term |  |  | 1 year 11 months 5 days |  |  |
Options, Additional Information [Abstract] |  |  |  |  |  |
Aggregate intrinsic value | $ |  |  | $ 9,177 |  |  |
Aggregate intrinsic value, exercisable | $ |  |  | $ 9,177 |  |  |
Nonvested Restricted Stock Awards, Weighted-Average Grant Date Fair Value [Abstract] |  |  |  |  |  |
Granted (in dollars per share) |  |  | $ 54.97 |  |  |
2010 Omnibus Incentive Plan [Member] | Performance-Based Options [Member] | First Performance Level |  |  |  |  |  |
Stock-Based Compensation [Abstract] |  |  |  |  |  |
Vesting percentage |  |  | 33.00% |  |  |
2010 Omnibus Incentive Plan [Member] | Performance-Based Options [Member] | Second Performance Level |  |  |  |  |  |
Stock-Based Compensation [Abstract] |  |  |  |  |  |
Vesting percentage |  |  | 33.00% |  |  |
2010 Omnibus Incentive Plan [Member] | Performance-Based Options [Member] | Third Performance Level |  |  |  |  |  |
Stock-Based Compensation [Abstract] |  |  |  |  |  |
Vesting percentage |  |  | 33.00% |  |  |
2010 Omnibus Incentive Plan [Member] | Non-Vested Restricted Stock [Member] |  |  |  |  |  |
Options, Weighted-Average Exercise Price [Roll Forward] |  |  |  |  |  |
Granted (in dollars per share) |  |  | $ 54.80 |  |  |
Nonvested Restricted Stock Awards, Number of Shares [Roll Forward] |  |  |  |  |  |
Nonvested at beginning of year (in shares) | shares |  |  | 673,800 |  |  |
Granted (in shares) | shares |  |  | 358,100 |  |  |
Vested (in shares) | shares |  |  | (249,100) |  |  |
Forfeited (in shares) | shares |  |  | (120,600) |  |  |
Nonvested at end of year (in shares) | shares |  |  | 662,200 | 673,800 |  |
Nonvested Restricted Stock Awards, Weighted-Average Grant Date Fair Value [Abstract] |  |  |  |  |  |
Nonvested, beginning balance (in dollars per share) |  |  | $ 60.14 |  |  |
Granted (in dollars per share) |  |  | 54.80 |  |  |
Vested (in dollars per share) |  |  | 52.52 |  |  |
Forfeited (in dollars per share) |  |  | 56.03 |  |  |
Nonvested, Ending Balance (in dollars per share) |  |  | $ 60.87 | $ 60.14 |  |
Unrecognized Stock-Based Compensation Expense [Abstract] |  |  |  |  |  |
Unrecognized stock-based compensation expense | $ |  |  | $ 22,200 |  |  |
Unrecognized stock-based compensation expense, period for recognition |  |  | 2 years 6 months |  |  |
Amended and Restated 2010 Omnibus Incentive Plan [Member] | Performance-Based Options [Member] |  |  |  |  |  |
Stock-Based Compensation [Abstract] |  |  |  |  |  |
Number of installments for vesting | Installment |  |  | 4 |  |  |
Number of established performance levels for vesting | Level |  |  | 4 |  |  |
Amended and Restated 2010 Omnibus Incentive Plan [Member] | Performance-Based Options [Member] | First Performance Level |  |  |  |  |  |
Stock-Based Compensation [Abstract] |  |  |  |  |  |
Vesting percentage |  |  | 25.00% |  |  |
Amended and Restated 2010 Omnibus Incentive Plan [Member] | Performance-Based Options [Member] | Second Performance Level |  |  |  |  |  |
Stock-Based Compensation [Abstract] |  |  |  |  |  |
Vesting percentage |  |  | 25.00% |  |  |
Amended and Restated 2010 Omnibus Incentive Plan [Member] | Performance-Based Options [Member] | Third Performance Level |  |  |  |  |  |
Stock-Based Compensation [Abstract] |  |  |  |  |  |
Vesting percentage |  |  | 25.00% |  |  |
Amended and Restated 2010 Omnibus Incentive Plan [Member] | Performance-Based Options [Member] | Fourth Performance Level |  |  |  |  |  |
Stock-Based Compensation [Abstract] |  |  |  |  |  |
Vesting percentage |  |  | 25.00% |  |  |
[1] | The risk-free interest rate is based upon the rate on a zero coupon U.S. Treasury bill, for periods within the contractual life of the option, in effect at the time of the grant.
[2] | The dividend yield is based on the average of historical stock prices and actual dividends paid.
[3] | Expected volatility is based on the historical volatility of the Company's stock price, over a period similar to the expected life of the option.
[4] | The expected term of the option is based on the historical employee exercise behavior, the vesting terms of the respective option, and a contractual life of either seven or ten years.

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- Definition Number of installments for vesting share-based compensation awards. + References No definition available. + Details
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- Definition Amount of deferred tax expense from write-off of the deferred tax asset related to deductible stock options at exercise. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 20 -Section 55 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=32706628&loc=d3e11283-113907 + Details
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- Definition Unrecognized cost of unvested share-based compensation awards. + 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 + Details
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- Definition Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, 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 50 -Paragraph 2 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The cash inflow associated with the amount received from holders exercising their stock options. This item inherently excludes any excess tax benefit, which the entity may have realized and reported separately. + 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 Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3255-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 + Details
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- Definition The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3602-108585 + 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 + 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 + 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 + Details
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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + 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 + 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 + 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 + 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 + 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 + 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 + Details
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- Definition Number of additional shares authorized for issuance under an established share-based compensation plan. + References No definition available. + 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 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 weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable 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)(iii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition For presentations that combine terminations, the number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan or that expired. + 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)-(4) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Weighted average price of options that were either forfeited or expired. + 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)-(4) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + 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 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 by which the current fair value of the underlying stock exceeds the 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 + Details
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- Definition Number of options outstanding, including both vested and non-vested options. + 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 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 + 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 + Details
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