Leases Lease Cost (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2019 USD ($)
Leases [Abstract]
Finance Lease, Right-of-Use Asset, Amortization	$ 162
Finance Lease, Interest Expense	40
Operating Lease, Cost	2,237
Variable Lease, Cost	590
Finance Lease, Principal Payments	95
Operating Lease, Payments	633
Right-of-Use Asset Obtained in Exchange for Finance Lease Liability	$ 3,232
Finance Lease, Weighted Average Remaining Lease Term	4 years 9 months
Operating Lease, Weighted Average Remaining Lease Term	40 years 6 months
Finance Lease, Weighted Average Discount Rate, Percent	5.16%
Operating Lease, Weighted Average Discount Rate, Percent	5.16%