Business and Basis of Presentation - Additional Information (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2019 USD ($)	Jun. 30, 2018 USD ($) business	Jun. 30, 2019 USD ($)	Jun. 30, 2018 USD ($)	Jan. 01, 2019 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Revenue recognized previously attributable to deferred revenues	$ 708,300,000	$ 651,900,000	$ 1,062,000,000.0	$ 969,300,000
Acquisition and integration charges (credits)	(358,000)	19,962,000	2,414,000	79,228,000
Business exit costs		$ 9,800,000		51,400,000
Number of businesses sold | business		2
Disposal group, revenue		$ 1,000,000.0		55,000,000.0
Disposal group, pre-tax income		0		34,100,000
Cash received from divestitures		406,500,000	0	406,542,000
Gain from divested operations	0	25,460,000	(2,075,000)	25,460,000
Gain (loss) from divested operations	0	25,460,000	(2,075,000)	25,460,000
Cash and cash equivalents and restricted cash, beginning of period	218,453,000	$ 159,956,000	218,453,000	$ 159,956,000		$ 158,663,000	$ 567,058,000
Cash and cash equivalents	218,453,000		218,453,000			156,368,000
Restricted cash						2,300,000
Operating leases - right-of-use assets	637,701,000		637,701,000		$ 651,900,000
Lease liabilities	841,502,000		841,502,000		851,300,000
Total Assets	6,729,641,000		6,729,641,000			6,201,474,000
Total Liabilities	$ 5,765,839,000		$ 5,765,839,000			$ 5,350,717,000
United States
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Percentage of lease payments	84.00%		84.00%
ASU 2016-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Total Assets					638,700,000
Total Liabilities					$ 638,700,000