Leases - Narrative (Details) $ in Thousands	1 Months Ended	9 Months Ended
	Dec. 31, 2018 USD ($)	Sep. 30, 2019 USD ($) lease	Jan. 01, 2019 USD ($)
Lessee, Lease, Description [Line Items]
Operating lease ROU assets	$ 0	$ 55,597	$ 48,800
Lease liabilities		$ 55,907	$ 48,900
Lessee, Number of Leases | lease		45
Gross proceeds from sale	$ 23,000
Lease renewal term	20 years
Annual rental payments rent increase period	5 years
Annual rental payments	$ 1,500
Annual rental increase every five years (percent)	10.00%
Annual rental payments rent increase renewal period	5 years
Sale-leaseback gain	$ 11,900
Sale-leaseback gain, tax	$ 4,000
Minimum
Lessee, Lease, Description [Line Items]
Operating lease remaining term		1 year
Maximum
Lessee, Lease, Description [Line Items]
Operating lease remaining term		20 years