Condensed Consolidated Statements of Comprehensive Income - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
NET INCOME	$ 29,739,000	$ 27,937,000	$ 88,366,000	$ 73,269,000
OTHER COMPREHENSIVE INCOME (LOSS):
Translation adjustments, net of tax	(19,000)	4,000	(44,000)	9,000
Cumulative-effect adjustment for adoption of Accounting Standards Update 2018-02	0	0	0	(24,000)
Total other comprehensive income (loss)	(19,000)	4,000	(44,000)	(15,000)
COMPREHENSIVE INCOME	$ 29,720,000	$ 27,941,000	$ 88,322,000	$ 73,254,000