Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)
Beginning Balance at Dec. 31, 2015	$ 607,322	$ 2,000	$ 340,931	$ 258,985	$ 5,406
Net income (loss)	31,883			31,883
Other comprehensive income (loss), net of income tax	25,134				25,134
Ending Balance at Mar. 31, 2016	664,339	2,000	340,931	290,868	30,540
Beginning Balance at Dec. 31, 2016	696,733	2,000	340,931	349,395	4,407
Net income (loss)	(56,574)			(56,574)
Other comprehensive income (loss), net of income tax	4,111				4,111
Ending Balance at Mar. 31, 2017	$ 644,270	$ 2,000	$ 340,931	$ 292,821	$ 8,518