CONDENSED CONSOLIDATED STATEMENT OF STOCKHOLDERS EQUITY (Unaudited) - 3 months ended Mar. 31, 2017 - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock Shares [Member]	Treasury Stock-Common [Member]	Non-Redeemable Preferred Stock [Member]	Capital in Excess of Par Value [Member]	Retained Earnings [Member]
Balance at Dec. 31, 2016	$ 492,513	$ 3,128	$ (20,088)	$ 3,000	$ 192,172	$ 314,301
Balance, shares at Dec. 31, 2016		31,281	(3,005)
Cumulative effect of change in accounting principle	1,060					1,060
Net loss	(5,986)					(5,986)
Dividend accrued on redeemable preferred stock	(5,536)					(5,536)
Accretion of redeemable preferred stock	(1,599)					(1,599)
Stock-based compensation	1,172				1,172
Issuance of restricted stock, net	(66)		$ 845		(911)
Issuance of restricted stock, net, shares			130
Balance at Mar. 31, 2017	$ 481,558	$ 3,128	$ (19,243)	$ 3,000	$ 192,433	$ 302,240
Balance, shares at Mar. 31, 2017		31,281	(2,875)