Consolidated Statements of Stockholders' Equity - 6 months ended Jun. 30, 2017 - USD ($) $ in Thousands	Total	Capital Stock, Common	Additional Paid-in Capital	Retained Earnings	Treasury Stock
Balance at Dec. 31, 2016	$ 505,826	$ 907	$ 3,433	$ 625,668	$ (124,182)
Net income	28,653	0	0	28,653	0
Dividends on common stock, $0.04 per share	(3,334)	0	0	(3,334)	0
Stock-based compensation, net of tax	163	0	19	0	144
Balance at Jun. 30, 2017	$ 531,308	$ 907	$ 3,452	$ 650,987	$ (124,038)