Treasury Stock and Share Based Awards (Details) (USD $) In Thousands, except Share data	9 Months Ended
Sep. 30, 2011
Treasury stock
Balance at December 31, 2010, Shares	3,359,859
Balance at December 31, 2010	$ 44,725
Common stock repurchased, Shares, as a result of restricted stock forfeitures	853
Restricted stock withholdings, Shares	25,200
Restricted stock withholdings, Cost	494
Restricted stock awards cancelled, Number of Treasury Shares	4,613
Balance at September 30, 2011, Shares	3,390,525
Balance at September 30, 2011	45,219
Stock Options
Number of Options Outstanding Beginning Balance	140,356
Weighted Average Exercise Price Beginning Balance	$ 7.63
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 Grant Date Fair Value, Ending Balance	$ 351.00%
Weighted Average Grant Date Fair Value, Beginning Balance	$ 351.00%
Aggregate Intrinsic Value	924
Number of Options Exercisable at September 30, 2011	82,166
Weighted Average Exercise Price Exercisable at September 30, 2011	$ 7.63
Weighted Average Grant Date Fair Value Exercisable Number of Options Exercisable at September 30, 2011	$ 3.51
Aggregate Intrinsic Value Exercisable Number of Options Exercisable at September 30, 2011	924
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 Vested	(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	1,285,457
Weighted Average Grant Date Fair Value Unvested Restricted Stock, Ending	$ 16.52
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
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
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

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Treasury stock Abstract.

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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.

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The total dollar difference between fair values of the underlying shares reserved for issuance and exercise prices pertaining to options outstanding under the plan as of the balance sheet date.

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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.

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