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Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Statement of Comprehensive Income [Abstract]
Net income	$ 65,123	$ 42,904	$ 40,695
Other comprehensive income, net of tax
Change in interest rate swap	3,541	(5,055)	(209)
Total comprehensive income	68,664	37,849	40,486
Less: Net income attributable to noncontrolling interests	(2,478)	(598)	(794)
Comprehensive income attributable to Sterling common stockholders	$ 66,186	$ 37,251	$ 39,692

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