Stockholders' Equity (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2013	Mar. 31, 2013	Jun. 30, 2012	Mar. 31, 2012	Jun. 30, 2013
Stockholders' Equity Note [Abstract]
Shares repurchased under the program (in shares)					415,627
Shares withheld for tax withholding obligations for the vesting of restricted stock awards (in shares)					116,747
Authorized to repurchased additional shares under repurchase program (in shares)	1,413,845				1,413,845
Dividends declared per share of common stock (in dollars per share)	$ 0.17	$ 0.17	$ 0.17	$ 0.15
Dividends paid					$ 8,694