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Stock-Based Compensation, Common Stock Repurchases and Dividends Schedule of Restricted Stock Options (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value of restricted stock and restricted stock units granted	$ 1,288	$ 1,838	$ 2,138
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of restricted stock and restricted stock units granted	67	157	28
Fair value of restricted stock and restricted stock units granted	578	2,075	467
Per share weighted average grant-date fair value of restricted stock and restricted stock units granted	$ 8.63	$ 13.19	$ 16.98
Total fair value of restricted stock and restricted stock units vested	$ 394	$ 349	$ 632

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).

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