Unaudited Condensed Consolidated Statements of Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	AOCI Attributable to Parent	Treasury Stock	Noncontrolling Interest
Beginning Balance at Dec. 31, 2015					$ (60,893)
Change in fair value of available for sale securities	$ (2,037)
Ending Balance at Mar. 31, 2016					(50,389)
Beginning Balance at Dec. 31, 2016	494,644	$ 89	$ 1,033,729	$ 254,915	(70,428)	$ (842,952)	$ 119,291
Beginning Balance (in shares) at Dec. 31, 2016		89,717
Shares issued on vesting of restricted stock	1	$ 1
Shares issued on vesting of restricted stock (in shares)		234
Shares repurchased on vesting of restricted stock and exercise of stock options	(843)					(843)
Compensation expense in connection with restricted stock and stock options	1,722		1,722
Payments from non-controlling interest holders, net of imputed interest	2,934						2,934
Change in redemption value of redeemable non-controlling interest	1,276			1,276
Change in fair value of available for sale securities	(571)				(571)
Net income	(489)			(4,280)			3,791
Tax benefit related to amortization of convertible notes' discount	22		22
Foreign currency translation	2,640		10		2,630
Distributions to joint ventures	(2,917)						(2,917)
Ending Balance at Mar. 31, 2017	$ 498,419	$ 90	$ 1,035,483	$ 251,911	$ (68,369)	$ (843,795)	$ 123,099
Ending Balance (in shares) at Mar. 31, 2017		89,951