OPERATING AND GEOGRAPHICAL SEGMENTS - Reconciliation of Segment Information to Consolidated Statements of Operations (Details) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended
	Jun. 30, 2015	Mar. 31, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Segment Reporting [Abstract]
Segment income from operations	$ 35,198		$ 40,746	$ 75,884	$ 70,816
Unallocated amounts:
Allocated Share-based Compensation Expense	12,537		15,278	26,224	30,895
Loss from manufacturing facility damage and shutdown	0		0	0	7,056
Acquisition-related charges	3,807		1,497	8,210	3,125
French building underutilization	502		1,166	214	2,462
Restructuring Charges	4,882	$ 1,147	(1,583)	6,029	(1,807)
Gain from foundry arrangement	(765)		2,071	(1,957)	2,129
Gain on sale of assets	2,053		0	2,053	0
Income from operations	$ 14,758		$ 26,459	$ 35,303	$ 31,214