Condensed Consolidated Statements of Equity - USD ($) $ in Thousands	Total	Common Shares	Additional Paid-in Capital	Treasury Shares	Accumulated Other Comprehensive Income (Loss)	Retained Earnings	Noncontrolling Interests
Beginning Balance at Dec. 31, 2020	$ 1,160,660	$ 138	$ 348,714	$ (966)	$ (12,076)	$ 626,081	$ 198,769
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	59,386					58,606	780
Other comprehensive income	7,311				7,311
Amounts reclassified from Accumulated other comprehensive income	2,928				2,928
Contributions from noncontrolling interests	2,940						2,940
Distributions to noncontrolling interests	(25)						(25)
Stock awards, stock option exercises and other shares issued to employees and directors, net of income tax	3,398	2	8,892	(2,016)		(3,480)
Dividends declared per common share	(11,634)					(11,634)
Restricted share award dividend equivalents	0			332		(332)
Ending Balance at Jun. 30, 2021	1,224,964	140	357,606	(2,650)	(1,837)	669,241	202,464
Beginning Balance at Mar. 31, 2021	1,182,551	140	355,961	(2,872)	(1,214)	631,652	198,884
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	46,124					43,499	2,625
Other comprehensive income	(2,108)				(2,108)
Amounts reclassified from Accumulated other comprehensive income	1,485				1,485
Contributions from noncontrolling interests	980						980
Distributions to noncontrolling interests	(25)						(25)
Stock awards, stock option exercises and other shares issued to employees and directors, net of income tax	1,783		1,645	138
Dividends declared per common share	(5,826)					(5,826)
Restricted share award dividend equivalents	0			84		(84)
Ending Balance at Jun. 30, 2021	1,224,964	140	357,606	(2,650)	(1,837)	669,241	202,464
Beginning Balance at Dec. 31, 2021	1,307,704	140	368,595	(263)	1,194	702,759	235,279
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	107,610					85,307	22,303
Other comprehensive income	11,721				11,721
Amounts reclassified from Accumulated other comprehensive income	2,175				2,175
Contributions from noncontrolling interests	2,450						2,450
Distributions to noncontrolling interests	(9,980)						(9,980)
Stock awards, stock option exercises and other shares issued to employees and directors, net of income tax	7,708	2	10,091	(2,385)
Dividends declared per common share	(12,182)					(12,182)
Restricted share award dividend equivalents	0		54	335		(389)
Ending Balance at Jun. 30, 2022	1,417,206	142	378,740	(2,313)	15,090	775,495	250,052
Beginning Balance at Mar. 31, 2022	1,317,221	142	375,794	(2,265)	13,555	701,799	228,196
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	101,661					79,805	21,856
Other comprehensive income	750				750
Amounts reclassified from Accumulated other comprehensive income	785				785
Stock awards, stock option exercises and other shares issued to employees and directors, net of income tax	2,883		2,946	(63)
Dividends declared per common share	(6,094)					(6,094)
Restricted share award dividend equivalents	0			15		(15)
Ending Balance at Jun. 30, 2022	$ 1,417,206	$ 142	$ 378,740	$ (2,313)	$ 15,090	$ 775,495	$ 250,052