Leases - Supplemental Balance Sheet Information Related to Leases (Details) $ in Thousands	Mar. 31, 2019 USD ($)
Operating leases:
Operating lease ROU assets	$ 64,277
Current operating lease liabilities	11,738
Noncurrent operating lease liabilities	34,817
Total operating lease liabilities	46,555
Finance lease expense:
Finance lease ROU assets	3,395
Accumulated amortization	(1,191)
Finance lease ROU assets, net	2,204
Current finance lease liabilities	1,012
Non-current finance lease liabilities	818
Total finance lease obligations	$ 1,830
Weighted average remaining lease term (in years):
Operating leases	5 years
Finance leases	1 year 10 months 24 days
Weighted average discount rate:
Operating leases	3.80%
Finance leases	3.70%