Leases Components of Lease Expense (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Jan. 01, 2019
Leases [Abstract]
Operating lease right-of-use asset	$ 49,372	$ 52,000
Finance lease right-of-use asset	0
Operating lease liability	53,516	$ 56,000
Finance lease liability	$ 0