Stockholders' Equity (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2018	Mar. 31, 2018	Jun. 30, 2017	Mar. 31, 2017	Jun. 30, 2018	Jun. 30, 2017
Stockholders' Equity Note [Abstract]
Aggregate number of shares repurchased during the period (in shares)					211,876
Shares repurchased under the program (in shares)					80,000
Authorized to repurchased additional shares under repurchase program (in shares)	2,597,564				2,597,564
Shares withheld for tax withholding obligations for the vesting of restricted stock awards (in shares)					131,876
Dividends declared per share of common stock (in dollars per share)	$ 0.20	$ 0.20	$ 0.150	$ 0.125
Payments of Dividends					$ 16,786	$ 11,579