Condensed Consolidated Statement of Changes In Stockholders' Equity - 3 months ended Mar. 31, 2018 - USD ($) $ in Thousands	Total	Capital Stock Preferred	Common Stock	Additional Paid-In Capital	Retained Earnings	Accumulated Other Comprehensive Loss	Treasury Stock
Beginning Balance at Dec. 31, 2017	$ 168,730	$ 4	$ 6,715	$ 13,912	$ 167,129	$ (311)	$ (18,719)
Comprehensive income:
Net income	8,927				8,927
Other comprehensive loss	(13)					(13)
Dividends and dividend equivalents, net of estimated forfeitures	(1,374)				(1,374)
Share-based compensation	1,052			1,052
Stock shares awarded, forfeited, or vested	139			(981)			1,120
Purchase of treasury stock for tax withholding on share-based compensation	(2,073)						(2,073)
Ending Balance at Mar. 31, 2018	$ 175,388	$ 4	$ 6,715	$ 13,983	$ 174,682	$ (324)	$ (19,672)