Condensed Consolidated Statements of Changes in Equity - USD ($) $ in Thousands	Common stock [Member]	Additional paid-in capital ("APIC") [Member]	Retained earnings [Member]	Accumulated other comprehensive loss [Member]	Non-controlling interest ("NCI") [Member]	Total
Balance at Dec. 31, 2020	$ 200,451	$ 49,171	$ 791,918	$ (34,295)	$ 5,154	$ 1,012,399
Balance, shares at Dec. 31, 2020	109,876,428
Net income			28,188		(49)	28,139
Other comprehensive income (loss)				(10,344)	(16)	(10,360)
Comprehensive income			28,188	(10,344)	(65)	17,779
Stock option exercises	$ 8,268	(1,549)				6,719
Stock option exercises, shares	197,863
Issuance of common stock related to vesting of share units	$ 2,046	(11,347)				(9,301)
Issuance of common stock related to vesting of share units, shares	234,275
Forfeiture of common stock related to business combinations, shares	(55,510)
Share based continuing employment costs related to business combinations		2,553				$ 2,553
Shares forfeited						(55,510)
Stock option compensation expense		1,861				$ 1,861
Equity-classified share unit expense		2,779				2,779
Equity-classified share units dividend equivalents		144	(144)
Cash dividends paid			(24,181)			(24,181)
Balance at Mar. 31, 2021	$ 210,765	43,612	795,781	(44,639)	5,089	1,010,608
Balance, shares at Mar. 31, 2021	110,253,056
Balance at Dec. 31, 2021	$ 227,504	59,535	839,609	(55,973)	388	1,071,063
Balance, shares at Dec. 31, 2021	110,618,049
Net income			178,094		7	178,101
Other comprehensive income (loss)				(1,157)	(10)	(1,167)
Comprehensive income			178,094	(1,157)	(3)	176,934
Stock option exercises	$ 1,207	(221)				986
Stock option exercises, shares	24,248
Issuance of common stock related to vesting of share units	$ 2,353	(5,902)				(3,549)
Issuance of common stock related to vesting of share units, shares	92,946
Share based continuing employment costs related to business combinations		2,133				2,133
Stock option compensation expense		2,567				2,567
Equity-classified share unit expense		2,890				2,890
Equity-classified share units dividend equivalents		121	(121)
Cash dividends paid			(27,659)			(27,659)
Balance at Mar. 31, 2022	$ 231,064	$ 61,123	$ 989,923	$ (57,130)	$ 385	$ 1,225,365
Balance, shares at Mar. 31, 2022	110,735,243