Stockholders' Equity (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2014	Mar. 31, 2014	Jun. 30, 2013	Mar. 31, 2013	Jun. 30, 2014	Jun. 30, 2013
Stockholders' Equity Note [Abstract]
Shares repurchased under the program (in shares)					383,898
Shares withheld for tax withholding obligations for the vesting of restricted stock awards (in shares)					112,328
Authorized to repurchased additional shares under repurchase program (in shares)	965,671				965,671
Dividends declared per share of common stock (in dollars per share)	$ 0.19	$ 0.17	$ 0.17	$ 0.17
Payments of Dividends					$ 9,203	$ 8,694