CONSOLIDATED STATEMENTS OF EQUITY - USD ($) shares in Thousands, $ in Thousands	Common Stock	AOCI	Parent	Noncontrolling Interest	Total
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	$ 61,002		61,002		61,002
Other comprehensive 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	$ 8,375		8,375		8,375
Common shares issued (in 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
Net income	$ 100,977		100,977		100,977
Other comprehensive loss		(30,064)	(30,064)		(30,064)
Common shares (restricted and deferred) issued under employee and non-employee director share plans	$ 299		299		299
Common shares (restricted and deferred) issued under employee and non-employee director share plans (in shares)	9
Cumulative change due to change in accounting principle	$ (267)		(267)		(267)
Common share repurchases	$ (2,730)		(2,730)		(2,730)
Common share repurchases (in shares)	(86)
Balance at Dec. 31, 2019	$ 273,492	$ 7,633	$ 281,125		$ 281,125
Balance (in shares) at Dec. 31, 2019	5,805