CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Statement of Comprehensive Income [Abstract]
Net earnings	$ 45,368	$ 50,500	$ 46,493	$ 98,410
Other comprehensive income (loss), net of tax:
Cash flow hedges	(196)	194	(865)	(410)
Foreign currency translation adjustments	(24,888)	30,499	(1,526)	(35,465)
Total other comprehensive income (loss)	(25,084)	30,693	(2,391)	(35,875)
Comprehensive income	$ 20,284	$ 81,193	$ 44,102	$ 62,535