CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME [Abstract]
Net earnings	$ 126,256	$ 106,785	$ 73,646
Cash flow hedges adjustment, net of tax of $89, $61 and $153, respectively	(249)	(160)	423
Pension adjustment, net of tax of $785, $613 and $226, respectively	1,856	777	1,598
Foreign currency translation on net investment hedges	6,989	7,542	12,677
Tax effect of current year activity on net investment hedges	(2,733)	(2,966)	(4,947)
Foreign currency translation on long-term intercompany loans	(494)	(10,681)	(8,325)
Reclassification of cumulative translation to net earnings from liquidated entity	(3,257)	0	0
Other foreign currency translation	(45,515)	(79,446)	(92,556)
Total comprehensive income (loss)	$ 82,853	$ 21,851	$ (17,484)