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COMMON AND PREFERRED STOCK - Additional Information (Detail) (USD $) In Thousands, except Share data, unless otherwise specified |  |  |  |  |  | 12 Months Ended |  |  |
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Dec. 31, 2011 | Jan. 01, 2011 | Dec. 31, 2011 Stock Incentive Plan 1998 | Jan. 01, 2011 Stock Incentive Plan 1998 | Dec. 31, 2011 Stock Incentive Plan 1998 Restricted Stock | Dec. 31, 2011 Stock Incentive Plan 1998 Stock Options | Dec. 31, 2011 Stock Incentive Plan 1998 Maximum | Dec. 31, 2011 Stock Incentive Plan 2007 | Jan. 01, 2011 Stock Incentive Plan 2007 | Dec. 31, 2011 Stock Incentive Plan 2007 Restricted Stock | Dec. 31, 2011 Stock Incentive Plan 2007 Stock Options | Dec. 31, 2011 Stock Incentive Plan 2011 Maximum
Stockholders Equity Note [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Common stock, shares authorized | 47,500,000 | 47,500,000 |  |  |  |  |  |  |  |  |  |
Non-voting Preferred Stock, shares authorized | 2,000,000 | 2,000,000 |  |  |  |  |  |  |  |  |  |
Common stock, shares outstanding | 18,655,910 | 18,458,011 |  |  |  |  |  |  |  |  |  |
Stock repurchase program, shares authorized for repurchase | 1,800,000 |  |  |  |  |  |  |  |  |  |  |
Stock repurchase program, shares repurchased | 1,540,183 |  |  |  |  |  |  |  |  |  |  |
Stock repurchase program, remaining shares authorized for repurchase | 259,817 |  |  |  |  |  |  |  |  |  |  |
Treasury stock, shares | 4,437,428 | 4,233,810 |  |  |  |  |  |  |  |  |  |
Treasury Stock, value | $ 126,682 | $ 111,019 |  |  |  |  |  |  |  |  |  |
Options expiration period |  |  |  |  |  |  | 10 years |  |  |  |  |
Share-based awards, aggregate shares issued |  |  | 3,363,506 |  | 928,186 | 2,435,320 |  | 894,518 |  | 890,889 | 3,629 |
Share-based awards, aggregate shares exercised |  |  |  |  |  | 1,733,650 |  |  |  |  | 708 |
Share-based awards, shares unvested |  |  |  |  | 132,072 |  |  |  |  | 555,288 |  |
Share-based awards, shares outstanding |  |  | 706,670 | 724,888 |  | 706,670 |  | 2,597 | 2,921 |  | 2,597 |
Share-based awards, aggregate shares cancelled |  |  |  |  | 123,514 |  |  |  |  |  |  |
Share-based awards, maximum shares that can be issued |  |  |  |  |  |  |  |  |  |  |  | 550,000

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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 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. 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 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 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 Number of common and preferred shares that were previously issued and that were repurchased by the issuing entity and held in treasury on the financial statement date. This stock has no voting rights and receives no dividends. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29, 30 -Article 5 Reference 2: 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 + Details
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