CONDENSED CONSOLIDATED STATEMENT OF STOCKHOLDERS EQUITY (Unaudited) - 9 months ended Sep. 30, 2016 - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock Shares [Member]	Non-Redeemable Preferred Stock [Member]	Capital in Excess of Par Value [Member]	Retained Earnings [Member]	Treasury Stock-Common [Member]
Balance at Dec. 31, 2015	$ 421,580	$ 2,713	$ 3,000	$ 192,249	$ 248,150	$ (24,532)
Balance shares at Dec. 31, 2015		27,132
Net income	133,701				133,701
Dividend accrued on redeemable preferred stock	(22,351)				(22,351)
Accretion of redeemable preferred stock	(16,620)				(16,620)
Stock-based compensation	4,201			4,201
Exercise of stock options	371	$ 4		367
Exercise of stock options, shares		45
Exercise of warrants, net		$ 411				(411)
Exercise of warrants, shares		4,104
Issuance of restricted stock, net	(467)			(2,887)		2,420
Excess income tax detriment associated with stock-based compensation	(414)			(414)
Balance at Sep. 30, 2016	$ 520,001	$ 3,128	$ 3,000	$ 193,516	$ 342,880	$ (22,523)
Balance shares at Sep. 30, 2016		31,281