CONDENSED CONSOLIDATED STATEMENT OF STOCKHOLDERS EQUITY (Unaudited) - 6 months ended Jun. 30, 2017 - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock Shares [Member]	Treasury Stock-Common [Member]	Capital in Excess of Par Value [Member]	Retained Earnings [Member]	Non-Redeemable Preferred Stock [Member]
Balance at Dec. 31, 2016	$ 492,513	$ 3,128	$ (20,088)	$ 192,172	$ 314,301	$ 3,000
Balance, shares at Dec. 31, 2016		31,281	(3,005)
Cumulative effect of change in accounting principle	1,060				1,060
Net loss	(13,019)				(13,019)
Dividend accrued on redeemable preferred stock	(11,325)				(11,325)
Accretion of redeemable preferred stock	(3,217)				(3,217)
Stock-based compensation	2,748			2,748
Issuance of restricted stock, net	(66)		$ 845	(911)
Issuance of restricted stock, net, shares			130
Balance at Jun. 30, 2017	$ 468,694	$ 3,128	$ (19,243)	$ 194,009	$ 287,800	$ 3,000
Balance, shares at Jun. 30, 2017		31,281	(2,875)