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Treasury Stock and Share Based Awards (Details) (USD $) | 6 Months Ended |
--- | --- | ---
Jun. 30, 2011 | Dec. 31, 2010
Treasury stock |  |
Balance at December 31, 2010, Shares | 3,359,859 |
Balance at December 31, 2010 | $ 44,725,000 |
Common stock repurchased, Shares, as a result of restricted stock forfeitures | 853 |
Restricted stock withholdings, Shares | 25,200 |
Restricted stock withholdings, Cost | 494,000 |
Restricted stock awards cancelled, Number of Treasury Shares | 4,613 |
Balance at June 30, 2011, Shares | 3,390,525 |
Balance at June 30, 2011 | 45,219,000 |
Stock Options |  |
Number of Options Outstanding Beginning Balance | 140,356 |
Weighted Average Exercise Price Beginning Balance | $ 7.63 |
Weighted Average Grant Date Fair Value Beginning Balance |  | 3.51
Number of Options Exercised | (58,190) |
Weighted Average Exercise Price Exercised | $ 7.63 |
Weighted Average Grant Date Fair Value of Options Exercised During Period | $ 3.51 |
Number of Options Outstanding Ending Balance | 82,166 |
Weighted Average Exercise Price Ending Balance | $ 7.63 |
Weighted Average Exercise Price Ending Balance | $ 3.51 |
Aggregate Intrinsic Value | 1,075,000 |
Number of Options Exercisable at June 30, 2011 | 82,166 |
Weighted Average Exercise Price Exercisable at June 30, 2011 | $ 7.63 |
Weighted Average Grant Date Fair Value Exercisable Number of Options Exercisable at June 30, 2011 | 3.51 |
Aggregate Intrinsic Value Exercisable Number of Options Exercisable at June 30, 2011 | 1,075,000 |
Restricted stock |  |
Shares of Restricted Stock Outstanding, Beginning | 1,254,691 |
Weighted Average Grant Date Fair Value Outstanding, Beginning | $ 14.60 |
Shares of Restricted Stock Granted | 424,436 |
Weighted Average Grant Date Fair Value Granted | $ 19.45 |
Shares of Restricted Stock Forfeited | (853) |
Weighted Average Grant Date Fair Value Forfeited | $ 12.89 |
Shares of Restricted Stock Forfeited | (288,204) |
Weighted Average Grant Date Fair Value Vested | $ 10.84 |
Shares of Restricted Stock Cancelled | (4,613) |
Weighted Average Grant Date Fair Value Cancelled | $ 18.35 |
Shares of Restricted Stock Outstanding, Ending | 1,385,457 |
Weighted Average Grant Date Fair Value Outstanding, Ending | $ 16.85 |
Unvested restricted stock, Ending | 1,385,457 |
Weighted Average Grant Date Fair Value Unvested Restricted Stock, Ending | $ 3.51 |
at IRR of at least 8.5% [Member] |  |
Number of shares vest under restricted stock unit awards |  |
Number of shares vesting at an IRR level of at least 8.5% | 51,239 |
Fair value of shares vesting at an IRR level of at least 8.5% | 991,000 |
at IRR of at least 10.5% [Member] |  |
Number of shares vest under restricted stock unit awards |  |
Number of shares vesting at an IRR level of at least 10.5% | 102,488 |
Fair value of shares vesting at an IRR level of at least 10.5% | 1,983,000 |
at IRR of at least 12.5% [Member] |  |
Number of shares vest under restricted stock unit awards |  |
Number of shares vesting at an IRR level of at least 12.5% | 153,727 |
Fair value of shares vesting at an IRR level of at least 12.5% | $ 2,975,000 |

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- Definition The weighted average fair value of nonvested awards on share-based plans excluding option plans (for example, phantom stock plan, stock 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. + 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) 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) + Details
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- Definition The decrease in the number of shares potentially issuable under a share-based award plan pertaining to awards for which the grantee has gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares, 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 Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph b(2)(d) + Details
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