Leases - Lease Expense Components (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($)
Leases [Abstract]
Operating lease cost	$ 41,049
Short-term lease cost	1,823
Variable lease cost	3,477
Less: sublease income	(4,492)
Total lease expense, net	41,857
Cash paid for operating leases	44,976
Lease obligations in exchange for obtaining right-of-use assets, operating leases	$ 33,167
Weighted-average remaining term (in years) - operating leases	6 years 3 months 14 days
Weighted-average discount rate - operating leases	2.92%