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BUSINESS COMBINATIONS - Schedule of Unaudited Pro forma Combined Information (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Business Combination and Asset Acquisition [Abstract]
Revenues	$ 940,561	$ 872,046	$ 883,708
Operating income	76,576	58,121	55,328
Net income	$ 36,486	$ 83,585	$ 25,946
Basic weighted average shares outstanding	51,312	48,793	47,226
Basic earnings per common share (in dollars per share)	$ 0.71	$ 1.71	$ 0.55
Diluted weighted average shares outstanding	51,515	49,045	47,966
Diluted earnings per common share (in dollars per share)	$ 0.71	$ 1.70	$ 0.54

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- Definition

The pro forma operating income for the period as if the business combination or combinations had been completed at the beginning of the period.

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The pro forma basic net income per share for a period as if the business combination or combinations had been completed at the beginning of a period.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
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+ References

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The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period.

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