Operating Segment Information - Segment Reporting (Detail) - USD ($) $ in Thousands	3 Months Ended						6 Months Ended		9 Months Ended		12 Months Ended
	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Dec. 31, 2021	Dec. 31, 2020	Mar. 31, 2022	Mar. 31, 2021	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2020
Segment Reporting Information [Line Items]
Revenues											$ 1,459,419	$ 899,812
Income from operations	$ 17,474	$ 10,056	$ 10,462	$ 4,571	$ 6,738	$ 4,523	$ 20,518	$ 11,261	$ 37,992	$ 15,832	58,623	26,203
Other income (expense)											(440)	3,377
Income before income taxes											58,183	29,580
Depreciation and amortization											18,716	16,642
Total assets	$ 568,926	$ 524,155	$ 413,645	$ 341,943	$ 306,239	$ 294,102	$ 524,155	$ 306,239	$ 568,926	$ 341,943	497,351	374,528
Property, technology, and equipment, net											24,823	24,151
Goodwill											88,199	72,582	$ 72,199
US
Segment Reporting Information [Line Items]
Goodwill											67,226
Canada
Segment Reporting Information [Line Items]
Goodwill											20,973
Operating Segments | US
Segment Reporting Information [Line Items]
Revenues											1,283,033	781,473
Income from operations											56,406	35,479
Other income (expense)											678	676
Income before income taxes											57,084	36,155
Depreciation and amortization											5,651	3,929
Total assets											403,844	308,199
Property, technology, and equipment, net											11,606	12,734
Goodwill											67,226	50,801
Operating Segments | Canada
Segment Reporting Information [Line Items]
Revenues											177,814	118,828
Income from operations											18,569	11,982
Other income (expense)											233	(162)
Income before income taxes											18,802	11,820
Depreciation and amortization											3,509	2,586
Total assets											93,507	66,329
Property, technology, and equipment, net											13,217	11,417
Goodwill											20,973	21,781
Corporate/Eliminations
Segment Reporting Information [Line Items]
Revenues											(1,428)	(489)
Income from operations											(16,352)	(21,258)
Other income (expense)											(1,351)	2,863
Income before income taxes											(17,703)	(18,395)
Depreciation and amortization											$ 9,556	$ 10,127