Leases (Lease Assets and Liabilities) (Details)	6 Months Ended
	Jun. 30, 2019 USD ($)
Property, Plant and Equipment [Line Items]
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment	$ 7,133,000
Document Period End Date	Jun. 30, 2019
Assets
Operating lease assets	$ 108,013,000
Finance lease assets	13,689,000
Total leased assets	121,702,000
Current
Operating lease liabilities	35,084,000
Finance lease liabilities	1,286,000
Long-term
Operating lease liabilities	75,479,000
Finance lease liabilities	15,780,000
Total lease liabilities	$ 127,629,000