Leases (Lease Assets and Liabilities) (Details) $ in Thousands	Mar. 31, 2019 USD ($)
Assets
Operating lease assets	$ 112,286
Finance lease assets	13,689
Total leased assets	125,975
Current
Operating lease liabilities	34,814
Finance lease liabilities	1,293
Long-term
Operating lease liabilities	79,736
Finance lease liabilities	15,926
Total lease liabilities	131,769
Finance lease, accumulated amortization	$ 6,581