Leases - Narrative (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2019 USD ($)
Leases [Abstract]
Operating lease, expense	$ 16,500
Operating lease, right-of-use asset	160,200
Operating lease liability	168,100
Operating lease, liability, current	33,700
Operating lease, liability, noncurrent	$ 134,400
Operating lease, weighted average discount rate, percent	5.80%
Finance lease, right-of-use asset	$ 22,600
Finance lease, liability	22,200
Finance lease, liability, current	1,100
Finance lease, liability, noncurrent	$ 21,100
Operating lease, weighted average remaining lease term	6 years