Lease Commitments - Supplemental Balance Sheet (Details) $ in Thousands	Mar. 31, 2019 USD ($)
Leases [Abstract]
Operating lease assets	$ 97,646
Finance lease assets	3,272
Total leased assets	100,918
Operating lease, liability, current	28,142
Finance lease, liability, current	396
Operating lease, liability, noncurrent	72,730
Finance lease, liability, noncurrent	5,063
Total lease liabilities	$ 106,331