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STOCK BASED COMPENSATION PLANS (Details) (USD $) | 12 Months Ended
--- | ---
Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Number of compensation plans | 2 |  |  |  |  |
Shares available for grant under 2004 LTIP Plan (in shares) | 840,854 |  |  |  |  |
Weighted-Average Exercise Price [Roll Forward] |  |  |  |  |  |
Intrinsic value of exercised options and stock-settled appreciation rights | $ 760,000 |  | $ 49,000 |  | $ 1,172,000 |
Total compensation cost related to unvested equity awards | 4,110,000 |  |  |  |  |
Weighted-average period of recognition of cost | 2 years 6 months |  |  |  |  |
Restricted Stock Award [Member] |  |  |  |  |  |
Shares or Units and Rights [Roll Forward] |  |  |  |  |  |
Outstanding, beginning balance (in shares) | 432,025 |  | 289,125 |  | 292,175 |
Granted (in shares) | 252,700 |  | 249,600 |  | 201,400 |
Exercised or restrictions lapsed (in shares) | (127,050) | [1] | (104,000) | [1] | (195,325) | [1]
Forfeited or expired (in shares) | (1,750) |  | (2,700) |  | (9,125) |
Outstanding, ending balance (in shares) | 555,925 |  | 432,025 |  | 289,125 |
Weighted-Average Award Price [Roll Forward] |  |  |  |  |  |
Outstanding, beginning balance (in dollars per share) | $ 12.13 |  | $ 11.65 |  | $ 10.37 |
Granted (in dollars per share) | $ 12.34 |  | $ 12.67 |  | $ 12.07 |
Exercised or restrictions lapsed (in dollars per share) | $ 11.87 | [1] | $ 12.03 | [1] | $ 10.28 | [1]
Forfeited or expired (options) (in dollars per share) | $ 12.34 |  | $ 12.39 |  | $ 10.97 |
Outstanding, ending balance (in dollars per share) | $ 12.28 |  | $ 12.13 |  | $ 11.65 |
Weighted-Average Exercise Price [Roll Forward] |  |  |  |  |  |
Aggregate intrinsic value of outstanding awards | 9,067,000 |  |  |  |  |
Fair value of vested restricted common stock | 1,528,000 |  | 1,251,000 |  | 3,099,000 |
Period of restrictions over awards | 4 years |  |  |  |  |
Compensation expense | 2,553,000 |  | 2,060,000 |  | 1,716,000 |
Stock-Settled Appreciation Rights [Member] |  |  |  |  |  |
Shares or Units and Rights [Roll Forward] |  |  |  |  |  |
Outstanding, beginning balance (in shares) | 144,049 |  | 144,049 |  | 152,100 |
Granted (in shares) | 0 |  | 0 |  | 0 |
Exercised or restrictions lapsed (in shares) | (22,300) | [1] | 0 | [1] | (8,051) | [1]
Forfeited or expired (in shares) |  |  | 0 |  | 0 |
Outstanding, ending balance (in shares) | 121,749 |  | 144,049 |  | 144,049 |
Exercisable, ending balance (in shares) | 96,224 |  | 80,508 |  | 42,480 |
Weighted-Average Award Price [Roll Forward] |  |  |  |  |  |
Outstanding, beginning balance (in dollars per share) | $ 8.87 |  | $ 8.87 |  | $ 8.87 |
Granted (in dollars per share) | $ 0 |  | $ 0 |  | $ 0 |
Exercised or restrictions lapsed (in dollars per share) | $ 8.94 | [1] | $ 0 | [1] | $ 8.92 | [1]
Forfeited or expired (options) (in dollars per share) |  |  | $ 0 |  | $ 0 |
Outstanding, ending balance (in dollars per share) | $ 8.85 |  | $ 8.87 |  | $ 8.87 |
Exercisable, ending balance (in dollars per share) | $ 8.89 |  | $ 8.91 |  | $ 8.95 |
Weighted-Average Exercise Price [Roll Forward] |  |  |  |  |  |
Aggregate intrinsic value of vested awards | 714,000 |  |  |  |  |
Aggregate intrinsic value of outstanding awards | $ 908,000 |  |  |  |  |
Options [Member] |  |  |  |  |  |
Shares [Roll Forward] |  |  |  |  |  |
Outstanding, beginning balance (in shares) | 292,100 |  | 830,427 |  | 1,505,025 |
Granted (in shares) | 0 |  | 0 |  | 0 |
Exercised or restrictions lapsed (in shares) | (236,100) | [1] | (25,000) | [1] | (272,162) | [1]
Forfeited or expired (options) (in shares) | (6,000) |  | (513,327) |  | (402,436) |
Outstanding, ending balance (in shares) | 50,000 |  | 292,100 |  | 830,427 |
Exercisable, ending balance (in share) | 50,000 |  | 292,100 |  | 830,427 |
Weighted-Average Exercise Price [Roll Forward] |  |  |  |  |  |
Outstanding, beginning balance (in dollars per share) | $ 14.20 |  | $ 15.18 |  | $ 15.62 |
Granted (in dollars per share) | $ 0 |  | $ 0 |  | $ 0 |
Exercised or restrictions lapsed (in dollars per share) | $ 12.89 | [1] | $ 10.81 | [1] | $ 12.20 | [1]
Forfeited or expired (options) (in dollars per share) | $ 12.84 |  | $ 15.95 |  | $ 18.84 |
Outstanding, ending balance (in dollars per share) | $ 20.56 |  | $ 14.20 |  | $ 15.18 |
Exercisable, ending balance (in dollars per share) | $ 20.56 |  | $ 14.20 |  | $ 15.18 |
Options outstanding expiring 2013, Weighted average exercise price (in dollars per share) | $ 20.75 |  |  |  |  |
[1] | The total intrinsic value of options and stock-settled appreciation rights exercised was approximately $760,000, $49,000 and $1,172,000 in 2012, 2011 and 2010, respectively.

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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 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 total fair value of equity-based awards 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 (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 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 number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the 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 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)(c), 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 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 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)(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 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. + 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(1)(f) -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 Gross number of share options (or share units) granted during the period. + References No definition available. + 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 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 could have acquired the underlying shares with respect to stock options that were terminated. + 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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- Definition Number of share options (or share units) exercised during the current period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.28,29) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 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)(iv)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29, 30 -Article 5 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=6959260&loc=d3e187085-122770 + Details
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