Consolidated Statements of Changes in Equity - USD ($) $ in Thousands	Total	Common Stock	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive Income (Loss), net of tax
Balance, beginning of period at Dec. 31, 2018	$ 857,121	$ 367,252	$ 791,823	$ (287,337)	$ (14,617)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income (Loss)	54,546		54,546
Other Comprehensive Income (Loss), net of tax	7,664				7,664
Stock Award Activity	7,110	7,110	(11,830)	11,830
Dividends Declared	(27,217)		(27,217)
Purchase of Treasury Stock	(1,485)			(1,485)
Balance, end of period at Mar. 31, 2019	897,739	374,362	807,322	(276,992)	(6,953)
Temporary equity, beginning balance at Dec. 31, 2018	182,513
Increase (Decrease) in Temporary Equity [Roll Forward]
Net Income (Loss)	65
Other Comprehensive Income (Loss), net of tax	3,714
Subscriptions—Redeemable Noncontrolling Interest Holders	42
Stock Award Activity	2,126
Distributions to Noncontrolling Interest in Subsidiaries	(2,260)
Temporary equity, ending balance at Mar. 31, 2019	186,200
Balance, beginning of period at Dec. 31, 2019	1,041,280	392,210	930,351	(281,032)	(249)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income (Loss)	64,178		64,178
Other Comprehensive Income (Loss), net of tax	(24,859)				(24,859)
Stock Award Activity	7,467	7,467	(16,146)	16,146
Dividends Declared	(27,304)		(27,304)
Purchase of Treasury Stock	(15,959)			(15,959)
Change in Estimated Redemption Value of Redeemable Noncontrolling Interests	(1,870)		(1,870)
Balance, end of period at Mar. 31, 2020	1,042,933	$ 399,677	$ 949,209	$ (280,845)	$ (25,108)
Temporary equity, beginning balance at Dec. 31, 2019	212,086
Increase (Decrease) in Temporary Equity [Roll Forward]
Net Income (Loss)	(913)
Other Comprehensive Income (Loss), net of tax	(11,454)
Subscriptions—Redeemable Noncontrolling Interest Holders	5,577
Consolidation (Deconsolidation)	(4,019)
Stock Award Activity	2,153
Distributions to Noncontrolling Interest in Subsidiaries	(6,039)
Change in Estimated Redemption Value of Redeemable Noncontrolling Interests	1,870
Temporary equity, ending balance at Mar. 31, 2020	$ 199,261