CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common Stock	Retained Earnings	Cost of Common Stock in Treasury	Accumulated Other Comprehensive Income (Loss), Net	Total Shareholders' Equity	Noncontrolling Interests
Balance at Dec. 31, 2021	$ 969,464	$ 436,538	$ 603,787	$ (114,209)	$ (9,861)	$ 916,255	$ 53,209
Increase (Decrease) in Shareholders' Equity
Net income	27,401		27,390			27,390	11
Other comprehensive income (loss)	(70,676)				(70,676)	(70,676)
Issuance of 49,625 and 38,442 common shares under stock based compensation awards for the three months ended March 31, 2023 and 2022, respectively.	1,754		1,024	730		1,754
Cost of 16,359 and 45,419 shares of common stock acquired for treasury for the three months ended March 31, 2023 and 2022, respectively.	(2,175)			(2,175)		(2,175)
Common stock dividend ($0.32 and $0.31 per share for the three months ended March 31, 2023 and 2022, respectively.	(7,698)		(7,698)			(7,698)
Contributions from noncontrolling interests	1,627					0	1,627
Distributions to noncontrolling interests	$ (227)					0	(227)
Issuance of common shares under stock based compensation awards (in shares)	38,442
Common stock acquired for treasury (in shares)	45,419
Cash dividends (in dollars per share)	$ 0.31
Balance at Mar. 31, 2022	$ 919,470	436,538	624,503	(115,654)	(80,537)	864,850	54,620
Balance at Dec. 31, 2022	923,766	436,538	694,862	(119,642)	(147,690)	864,068	59,698
Increase (Decrease) in Shareholders' Equity
Net income	31,131		31,124			31,124	7
Other comprehensive income (loss)	20,225				20,225	20,225
Issuance of 49,625 and 38,442 common shares under stock based compensation awards for the three months ended March 31, 2023 and 2022, respectively.	2,425		1,426	999		2,425
Cost of 16,359 and 45,419 shares of common stock acquired for treasury for the three months ended March 31, 2023 and 2022, respectively.	(766)			(766)		(766)
Common stock dividend ($0.32 and $0.31 per share for the three months ended March 31, 2023 and 2022, respectively.	(7,917)		(7,917)			(7,917)
Distributions to noncontrolling interests	$ (420)					0	(420)
Issuance of common shares under stock based compensation awards (in shares)	49,625
Common stock acquired for treasury (in shares)	16,359
Cash dividends (in dollars per share)	$ 0.32
Balance at Mar. 31, 2023	$ 968,444	$ 436,538	$ 719,495	$ (119,409)	$ (127,465)	$ 909,159	$ 59,285