CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Statement of Comprehensive Income [Abstract]
Net earnings	$ 46,118	$ 71,563	$ 107,866	$ 110,758
Other comprehensive (loss) income, net of tax:
Fair value adjustment on interest rate swap contracts	(779)	0	(1,586)	0
Other Comprehensive Income (Loss), Net of Tax	4	0	4	0
Foreign currency translation adjustments	4,664	(45,541)	(2,776)	(31,604)
Total other comprehensive income (loss)	3,889	(45,541)	(4,358)	(31,604)
Comprehensive income	$ 50,007	$ 26,022	$ 103,508	$ 79,154