Acquisitions (Details) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Mar. 31, 2014	Sep. 30, 2015
Business Acquisition [Line Items]
Goodwill, Acquired During Period				$ 64,565
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual		$ 46,300
Landsafe [Member]
Business Acquisition [Line Items]
Payments to Acquire Businesses, Gross	$ 122,000
Goodwill, Acquired During Period	64,600
MSB/DQ Member [Domain]
Business Acquisition [Line Items]
Payments to Acquire Businesses, Gross			$ 652,500
Goodwill, Acquired During Period			$ 307,773
Customer Lists [Member] | Landsafe [Member]
Business Acquisition [Line Items]
Finite-lived Intangible Assets Acquired	$ 53,400
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	10 years
Other Intangible Assets [Member] | Landsafe [Member]
Business Acquisition [Line Items]
Finite-lived Intangible Assets Acquired	$ 4,300
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	10 years