Acquisition - Additional Information (Detail) (USD $)	6 Months Ended	12 Months Ended							9 Months Ended
	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2014 Masternaut Group Holdings Limited [Member]	Dec. 31, 2013 Minimum [Member] Other Noncurrent Assets [Member]	Dec. 31, 2013 Maximum [Member] Other Noncurrent Assets [Member]	Jun. 30, 2014 All 2013 Acquisitions [Member]	Dec. 31, 2013 All 2013 Acquisitions [Member]	Dec. 31, 2013 All 2013 Acquisitions [Member] Accrued Expenses And Other Long Term Liabilities [Member]	Mar. 31, 2015 All 2013 Acquisitions [Member] Earnings Growth Rate [Member] Monte Carlo Simulation [Member] Scenario, Forecast [Member]
Business Acquisition, Contingent Consideration [Line Items]
Aggregate purchase price	$ 166,700,000	$ 849,200,000
Deferred payment	23,200,000	36,800,000
Equity method investment, ownership percentage			44.00%
Contingent earn-out payment	86,723,000	80,476,000				53,700,000	83,800,000	53,700,000
Cash paid for acquisition		35,600,000
Contingent consideration future payments, low range	76,000,000
Contingent consideration future payments, high range	90,000,000
Contingent consideration payable									83,800,000
Uncertain tax positions	21,400,000	21,600,000				15,500,000	15,500,000
Indemnification asset recorded				$ 55,100,000	$ 56,200,000	$ 56,200,000	$ 56,200,000