CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Parenthetical) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Statement of Comprehensive Income [Abstract]
Unrealized gain on Euro-denominated notes, tax expense	$ 330	$ 466
Unrealized (loss) gain on investments, tax (benefit) expense	(89)	128
Unrealized gain on foreign currency exchange contracts, tax expense	2,052	224
Unrealized gain on cross currency swaps, tax expense	869	307
Reclassification adjustment for (gain) loss included in net income, tax expense	$ (240)	$ (249)