Goodwill and Other Intangible Assets, Net - Protocol Acquisition (Details) (USD $)	1 Months Ended	3 Months Ended	6 Months Ended
	Feb. 25, 2014	Mar. 31, 2014	Jun. 30, 2014	Dec. 31, 2014	Dec. 31, 2013	Jan. 01, 2012
Acquired Finite-Lived Intangible Assets [Line Items]
Total acquired intangible assets, Net carrying amount				$ 155,275,000	$ 163,400,000
Goodwill				493,890,000	490,196,000	490,308,000
Tangible and Intangible Assets of Unrelated Entity
Acquired Finite-Lived Intangible Assets [Line Items]
Acquisition, consideration transferred	13,000,000
Total acquired intangible assets, Net carrying amount			7,000,000
Goodwill			3,900,000
Initial accounting incomplete, adjustment			100,000
Initial accounting incomplete, adjustment, intangibles		300,000
Goodwill, purchase accounting adjustments		$ 200,000