Leases - Additional information (Details) $ in Thousands	Sep. 30, 2019 USD ($) Lease	Jan. 01, 2019 USD ($)	Dec. 31, 2018 USD ($)
Operating Leased Assets [Line Items]
Number of lease agreements | Lease	3
Operating lease right-of-use assets (Note 16)	$ 156,050	$ 194,000	$ 0
Operating lease, liability	78,693	119,000
Other	(37,976)		(129,312)
Other current liabilities	(161,716)		$ (184,229)
Lease not yet commenced	$ 705,000
Accounting Standards Update 2016-02
Operating Leased Assets [Line Items]
Other		85,000
Other current liabilities		$ 10,000