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			88,937		(17)	88,920
Other comprehensive income (loss)				(8,878)	(14)	(8,892)
Comprehensive income			88,937	(8,878)	(31)	80,028
Stock option exercises	$ 13,157	(2,458)				10,699
Stock option exercises, shares	311,153
Issuance of common stock related to vesting of share units	$ 2,058	(11,377)				(9,319)
Issuance of common stock related to vesting of share units, shares	234,737
Forfeiture of common stock related to business combinations, shares	(55,510)
Share based continuing employment costs related to business combinations		5,231				$ 5,231
Shares forfeited						(55,510)
Stock option compensation expense		3,770				$ 3,770
Equity-classified share unit expense		7,182				7,182
Equity-classified share units dividend equivalents		281	(281)
Cash dividends paid			(48,537)		(26)	(48,563)
Balance at Jun. 30, 2021	$ 215,666	51,800	832,037	(43,173)	5,097	1,061,427
Balance, shares at Jun. 30, 2021	110,366,808
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
Net income			60,749		32	60,781
Other comprehensive income (loss)				1,466	2	1,468
Comprehensive income			60,749	1,466	34	62,249
Stock option exercises	$ 4,889	(910)				3,979
Stock option exercises, shares	113,290
Issuance of common stock related to vesting of share units	$ 12	(30)				(18)
Issuance of common stock related to vesting of share units, shares	462
Share based continuing employment costs related to business combinations		2,678				2,678
Stock option compensation expense		1,909				1,909
Equity-classified share unit expense		4,404				4,404
Equity-classified share units dividend equivalents		137	(137)
Cash dividends paid			(24,356)		(26)	(24,382)
Balance at Jun. 30, 2021	$ 215,666	51,800	832,037	(43,173)	5,097	1,061,427
Balance, shares at Jun. 30, 2021	110,366,808
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			231,459		53	231,512
Other comprehensive income (loss)				(23,910)	(32)	(23,942)
Comprehensive income			231,459	(23,910)	21	207,570
Stock option exercises	$ 3,554	(692)				2,862
Stock option exercises, shares	80,183
Issuance of common stock related to vesting of share units	$ 2,367	(5,945)				(3,578)
Issuance of common stock related to vesting of share units, shares	93,556
Share based continuing employment costs related to business combinations	$ 1,819	2,394				4,213
Stock option compensation expense		5,623				5,623
Equity-classified share unit expense		11,684				11,684
Equity-classified share units dividend equivalents		415	(415)
Cash dividends paid			(55,352)			(55,352)
Balance at Jun. 30, 2022	$ 235,244	73,014	1,015,301	(79,883)	409	1,244,085
Balance, shares at Jun. 30, 2022	110,791,788
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
Net income			53,365		46	53,411
Other comprehensive income (loss)				(22,753)	(22)	(22,775)
Comprehensive income			53,365	(22,753)	24	30,636
Stock option exercises	$ 2,347	(471)				1,876
Stock option exercises, shares	55,935
Issuance of common stock related to vesting of share units	$ 14	(43)				(29)
Issuance of common stock related to vesting of share units, shares	610
Share based continuing employment costs related to business combinations	$ 1,819	261				2,080
Stock option compensation expense		3,056				3,056
Equity-classified share unit expense		8,794				8,794
Equity-classified share units dividend equivalents		294	(294)
Cash dividends paid			(27,693)			(27,693)
Balance at Jun. 30, 2022	$ 235,244	$ 73,014	$ 1,015,301	$ (79,883)	$ 409	$ 1,244,085
Balance, shares at Jun. 30, 2022	110,791,788