Consolidated Statements of Stockholders' Equity - 6 months ended Jun. 30, 2018 - USD ($) $ in Thousands	Total	Capital Stock, Common	Additional Paid-in Capital	Retained Earnings	Treasury Stock
Balance at Dec. 31, 2017	$ 574,645	$ 907	$ 3,518	$ 694,174	$ (123,954)
Net income	31,182	0	0	31,182	0
Dividends on common stock, $0.04 per share	(3,311)	0	0	(3,311)	0
Repurchases of common stock	(20,922)	0	0	0	20,922
Stock-based compensation, net of tax	195	0	(56)	0	251
Balance at Jun. 30, 2018	$ 581,789	$ 907	$ 3,462	$ 722,045	$ (144,625)