CONSOLIDATED STATEMENTS OF EQUITY - USD ($) shares in Thousands, $ in Thousands	Common Stock	AOCI	Parent [Member]	Noncontrolling Interest [Member]	Total
Balance at Dec. 31, 2016	$ 87,506	$ 37,818	$ 125,324	$ 134,999	$ 260,323
Balance (in shares) at Dec. 31, 2016	6,007
Net income (loss)	$ 19,402		19,402	(45,339)	(25,937)
Other comprehensive income (loss)		3,335	3,335	(26)	3,309
Distributions				(40)	(40)
Purchases of shares in a subsidiary (including price adjustments on prior purchases)	(1,134)		(1,134)	(65)	(1,199)
Common shares (restricted and deferred) issued under employee and non-employee director share plans	$ 253		253		253
Common shares (restricted and deferred) issued under employee and non-employee director share plans (in shares)	10
Common share repurchases	$ (9,607)		(9,607)		(9,607)
Common share repurchases (in shares)	(400)
Balance at Dec. 31, 2017	$ 96,420	41,153	137,573	89,529	227,102
Balance (in shares) at Dec. 31, 2017	5,617
Net income (loss)	$ 61,002		61,002		61,002
Other comprehensive income (loss)		(3,456)	(3,456)		(3,456)
Purchases of shares in a subsidiary (including price adjustments on prior purchases)	(73)		(73)		(73)
Options exercised (value)	$ 10,303		10,303		10,303
Options exercised (shares)	410
Common shares (restricted and deferred) issued under employee and non-employee director share plans	$ 328		328		328
Common shares (restricted and deferred) issued under employee and non-employee director share plans (in shares)	12
Net change due to deconsolidation				$ (89,529)	(89,529)
Cumulative change due to change in accounting principle	$ 9,206		9,206		9,206
Common shares issued, value	$ 8,375		8,375		8,375
Common shares issued, shares	250
Options tendered for payment of withholding taxes, value	$ (4,425)		(4,425)		(4,425)
Options tendered for payment of withholding taxes, shares	(190)
Common share repurchases	$ (5,923)		(5,923)		(5,923)
Common share repurchases (in shares)	(217)
Balance at Dec. 31, 2018	$ 175,213	$ 37,697	$ 212,910		$ 212,910
Balance (in shares) at Dec. 31, 2018	5,882