CONDENSED CONSOLIDATED STATEMENT OF STOCKHOLDERS EQUITY (Unaudited) - 6 months ended Jun. 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	150				150
Dividend accrued on redeemable preferred stock	(14,979)				(14,979)
Accretion of redeemable preferred stock	(4,484)				(4,484)
Stock-based compensation	2,921			2,921
Exercise of stock options	371	$ 4		367
Exercise of stock options, shares		45
Exercise of warrants		$ 411				(411)
Exercise of warrants, shares		4,104
Restricted stock granted from treasury stock				(2,971)		2,971
Excess income tax detriment associated with stock-based compensation	(414)			(414)
Balance at Jun. 30, 2016	$ 405,145	$ 3,128	$ 3,000	$ 192,152	$ 228,837	$ (21,972)
Balance shares at Jun. 30, 2016		31,281