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SHARE-BASED COMPENSATION (Details) (USD $) | 12 Months Ended
--- | ---
Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Shares authorized, granted and available for future grant under the Restricted Stock Plan [Abstract] |  |  |
Number of shares granted (in shares) | 76,417 |  |
Number of shares forfeited (in shares) | (19,260) |  |
Weighted-average grant price of granted shares (in dollars per share) | $ 38.99 |  |
Restricted Stock [Roll Forward] |  |  |
Non-vested, beginning balance (in shares) | 228,592 |  |
Granted (in shares) | 76,417 |  |
Forfeited (in shares) | (19,260) |  |
Vested (in shares) | (75,419) |  |
Nonvested, ending balance (in shares) | 210,330 | 228,592 |
Weighted Average Grant Price [Roll Forward] |  |  |
Non vested, beginning balance (in dollars per share) | $ 21.10 |  |
Granted (in dollars per share) | $ 38.99 |  |
Forfeitures (in dollars per share) | $ 32.68 |  |
Vested (in dollars per share) | $ 20.30 |  |
Nonvested, ending balance (in dollars per share) | $ 26.85 | $ 21.10 |
Stock compensation expense | $ 1,955,000 | $ 1,256,000 | $ 973,000
Restricted Stock [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Award vesting rights | The shares of restricted stock granted to employees and that are outstanding as of December 31, 2012 vest in accordance with one of the following vesting schedules: 100% one year after date of grant; 33.3% each year for three years after date of grant; 20% each year for five years after the grant date; or 10% each year for ten years after the grant date. |  |
Numerator used for calculating the number of whole shares granted | 75,000 |  |
Award vesting period | 1 year |  |
Shares authorized, granted and available for future grant under the Restricted Stock Plan [Abstract] |  |  |
Number of shares authorized for grants (in shares) | 800,000 |  |
Number of shares granted (in shares) | (688,371) |  |
Number of shares forfeited (in shares) | 79,998 |  |
Number of shares available for future grants (in shares) | 191,627 |  |
Weighted-average grant price of granted shares (in dollars per share) | $ 19.61 |  |
Restricted Stock [Roll Forward] |  |  |
Granted (in shares) | (688,371) |  |
Forfeited (in shares) | 79,998 |  |
Weighted Average Grant Price [Roll Forward] |  |  |
Granted (in dollars per share) | $ 19.61 |  |
Stock compensation expense | 2,000,000 | 1,300,000 | 1,000,000
Related income tax benefit recognized in earnings | 800,000 | 500,000 | 400,000
Unrecognized compensation expense | 4,600,000 | 4,100,000 |
Compensation cost not yet recognized, Period for recognition | 28 months 6 days |  |
Shares of the Company's common stock authorized for purchase | 800,000 |  |
Stock Options [Member] |  |  |
Share-based Payment Award, Options, Outstanding [Roll Forward] |  |  |
Outstanding and exercisable (in shares) |  | 0 | 50,000
Exercised (in shares) |  |  | (50,000)
Outstanding and exercisable (in shares) |  |  | 0
Options Price Per Share [Roll Forward] |  |  |
Outstanding and exercisable options price per share (in dollars per share) |  | $ 0 |
Outstanding and exercisable options price per share (in dollars per share) |  |  | $ 0
Share-based Payment Award, Options, Weighted Average Exercise Price [Roll Forward] |  |  |
Outstanding and exercisable, weighted average exercise price (in dollars per share) |  | $ 0 | $ 2.50
Exercised, weighted average exercise price (in dollars per share) |  |  | $ 2.50
Outstanding and exercisable, weighted average exercise price (in dollars per share) |  |  | $ 0
Aggregate Intrinsic Value [Abstract] |  |  |
Outstanding, aggregate intrinsic value |  | 0 | 529,000
Exercised, aggregate intrinsic value |  |  | 489,000
Outstanding, aggregate intrinsic value |  |  | 0
Cash received from stock options exercised | $ 0 | $ 0 | $ 125,000
Stock Options [Member] | Minimum [Member] |  |  |
Weighted Average Grant Price [Roll Forward] |  |  |
Weighted average remaining contractual term | 12 months |  |
Options Price Per Share [Roll Forward] |  |  |
Outstanding and exercisable options price per share (in dollars per share) |  |  | $ 1.25
Exercised options price per share (in dollars per share) |  |  | $ 1.25
Stock Options [Member] | Maximum [Member] |  |  |
Weighted Average Grant Price [Roll Forward] |  |  |
Weighted average remaining contractual term | 10 years |  |
Options Price Per Share [Roll Forward] |  |  |
Outstanding and exercisable options price per share (in dollars per share) |  |  | $ 3.36
Exercised options price per share (in dollars per share) |  |  | $ 3.36
Stock Options [Member] | Employee Stock Option Plan [Member] |  |  |
Shares authorized, granted and available for future grant under the Restricted Stock Plan [Abstract] |  |  |
Number of shares authorized for grants (in shares) | 1,800,000 |  |
Weighted Average Grant Price [Roll Forward] |  |  |
Shares of the Company's common stock authorized for purchase | 1,800,000 |  |
Stock Options [Member] | Long Term Incentive Plan [Member] |  |  |
Shares authorized, granted and available for future grant under the Restricted Stock Plan [Abstract] |  |  |
Number of shares authorized for grants (in shares) | 660,000 |  |
Weighted Average Grant Price [Roll Forward] |  |  |
Shares of the Company's common stock authorized for purchase | 660,000 |  |
Stock Options [Member] | Director Stock Option Plan [Member] |  |  |
Shares authorized, granted and available for future grant under the Restricted Stock Plan [Abstract] |  |  |
Number of shares authorized for grants (in shares) | 400,000 |  |
Weighted Average Grant Price [Roll Forward] |  |  |
Shares of the Company's common stock authorized for purchase | 400,000 |  |

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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 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 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 The total accumulated difference between fair values of underlying shares on dates of exercise and exercise price on options which were exercised (or share units converted) into shares during the reporting period under the 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 (d)(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 c(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 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 Weighted average remaining contractual term for fully vested and expected to vest options that are exercisable or convertible, 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 (e)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + 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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