Leased Properties - Additional Information (Details) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2019 USD ($)	Jun. 30, 2019 USD ($)
Lessee, Lease, Description [Line Items]
Option to extend, amount	$ 22,200	$ 22,200
Operating lease costs	$ 76,899	157,386
Operating lease, payments		150,882
Asset obtained in exchange		$ 113,771
Minimum
Lessee, Lease, Description [Line Items]
Renewal term	1 year	1 year
Maximum
Lessee, Lease, Description [Line Items]
Renewal term	20 years	20 years