Condensed Consolidated Statements of Equity (Unaudited) - USD ($) $ in Thousands	Total		Common Shares	Additional Paid-in Capital	Treasury Shares	Accumulated Other Comprehensive Loss	Retained Earnings	Noncontrolling Interests
Beginning Balance at Dec. 31, 2015	$ 783,739		$ 96	$ 222,848	$ (52,902)	$ (20,939)	$ 615,151	$ 19,485
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(15,622)						(14,696)	(926)
Other comprehensive income (loss)	2,612	[1]				2,612
Stock awards, stock option exercises and other shares issued to employees and directors, net of income tax of ($323) (126 shares) and $417 (212 shares)	2,330			(5,798)	8,128
Dividends declared ($0.16 and $0.155 per common share)	(4,340)						(4,340)
Ending Balance at Mar. 31, 2016	768,719		96	217,050	(44,774)	(18,327)	596,115	18,559
Beginning Balance at Dec. 31, 2016	790,697		96	222,910	(45,383)	(12,468)	609,206	16,336
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(3,035)						(3,089)	54
Other comprehensive income (loss)	504	[1]				504
Other change in noncontrolling interest	(8,359)							(8,359)
Stock awards, stock option exercises and other shares issued to employees and directors, net of income tax of ($323) (126 shares) and $417 (212 shares)	2,055			(2,549)	4,604
Dividends declared ($0.16 and $0.155 per common share)	(4,500)						(4,500)
Restricted share award dividend equivalents	0			5	52		(57)
Ending Balance at Mar. 31, 2017	$ 777,362		$ 96	$ 220,366	$ (40,727)	$ (11,964)	$ 601,560	$ 8,031

[1] All amounts are net of tax. Amounts in parentheses indicate debits