Condensed Consolidated Statement of Changes In Stockholders' Equity - 9 months ended Sep. 30, 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	25,462				25,462
Other comprehensive income	42					42
Dividends and dividend equivalents, net of estimated forfeitures	(4,122)				(4,122)
Share-based compensation	2,049			2,049
Stock shares awarded, forfeited, or vested	416			(1,073)			1,489
Purchase of treasury stock for tax withholding on equity-based compensation	(2,215)						(2,215)
Ending Balance at Sep. 30, 2018	$ 190,362	$ 4	$ 6,715	$ 14,888	$ 188,469	$ (269)	$ (19,445)