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Consolidated Statements of Stockholders' Equity (USD $) | Total | Common Stock Shares | Non-Redeemable Preferred Stock | Capital in Excess of Par Value | Accumulated Other Comprehensive Loss | Retained Earnings | Treasury Stock - Common
--- | --- | --- | --- | --- | --- | --- | ---
Beginning balance at Dec. 31, 2008 | $ 130,044,000 | $ 2,496,000 | $ 3,000,000 | $ 127,337,000 | $ (120,000) | $ 19,804,000 | $ (22,473,000)
Beginning balance, shares at Dec. 31, 2008 |  | 24,958,000 |  |  |  |  |
Net income | 21,584,000 |  |  |  |  | 21,584,000 |
Amortization of cash flow hedge | 120,000 |  |  |  | 120,000 |  |
Total comprehensive income | 21,704,000 |  |  |  |  |  |
Dividends paid on preferred stocks | (306,000) |  |  |  |  | (306,000) |
Stock-based compensation | 1,021,000 |  |  | 1,021,000 |  |  |
Exercise of stock options | 609,000 | 41,000 |  | 848,000 |  |  | (280,000)
Exercise of stock options, shares |  | 409,000 |  |  |  |  |
Excess income tax benefit associated with stock-based compensation | 731,000 |  |  | 731,000 |  |  |
Acquisition of shares of common stock | (3,200,000) |  |  |  |  |  | (3,200,000)
Conversion of shares of redeemable preferred stock to common stock | 4,000 |  |  | 4,000 |  |  |
Conversion of shares of redeemable preferred stock to common stock, shares |  | 2,000 |  |  |  |  |
Ending balance at Dec. 31, 2009 | 150,607,000 | 2,537,000 | 3,000,000 | 129,941,000 | 0 | 41,082,000 | (25,953,000)
Ending balance, shares at Dec. 31, 2009 |  | 25,369,000 |  |  |  |  |
Net income | 29,574,000 |  |  |  |  | 29,574,000 |
Dividends paid on preferred stocks | (305,000) |  |  |  |  | (305,000) |
Stock-based compensation | 1,005,000 |  |  | 1,005,000 |  |  |
Exercise of stock options | 829,000 | 11,000 |  | 818,000 |  |  |
Exercise of stock options, shares |  | 106,000 |  |  |  |  |
Excess income tax benefit associated with stock-based compensation | 78,000 |  |  | 78,000 |  |  |
Acquisition of shares of common stock | (2,421,000) |  |  |  |  |  | (2,421,000)
Conversion of shares of redeemable preferred stock to common stock | 3,000 |  |  | 3,000 |  |  |
Conversion of shares of redeemable preferred stock to common stock, shares |  | 2,000 |  |  |  |  |
Ending balance at Dec. 31, 2010 | 179,370,000 | 2,548,000 | 3,000,000 | 131,845,000 | 0 | 70,351,000 | (28,374,000)
Ending balance, shares at Dec. 31, 2010 |  | 25,477,000 |  |  |  |  |
Net income | 83,842,000 |  |  |  |  | 83,842,000 |
Dividends paid on preferred stocks | (305,000) |  |  |  |  | (305,000) |
Stock-based compensation | 1,099,000 |  |  | 1,099,000 |  |  |
Conversion of convertible debt to common stock | 26,904,000 | 98,000 |  | 26,806,000 |  |  |
Conversion of convertible debt to common stock, shares |  | 983,000 |  |  |  |  |
Exercise of stock options | 1,197,000 | 18,000 |  | 1,179,000 |  |  |
Exercise of stock options, shares |  | 178,000 |  |  |  |  |
Excess income tax benefit associated with stock-based compensation | 1,162,000 |  |  | 1,162,000 |  |  |
Conversion of shares of redeemable preferred stock to common stock | 1,000 |  |  | 1,000 |  |  |
Conversion of shares of redeemable preferred stock to common stock, shares | 979,160 |  |  |  |  |  |
Ending balance at Dec. 31, 2011 | $ 293,270,000 | $ 2,664,000 | $ 3,000,000 | $ 162,092,000 | $ 0 | $ 153,888,000 | $ (28,374,000)
Ending balance, shares at Dec. 31, 2011 |  | 26,638,000 |  |  |  |  |

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