Leases Lease Costs (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Mar. 31, 2019	Sep. 30, 2019	Dec. 31, 2018
Lease, Cost [Abstract]
Operating Lease, Right-of-Use Asset		$ 17,008	$ 0
Operating Lease, Cost	$ 2,016	6,265
Finance Lease, Right-of-Use Asset, Amortization	32	76
Finance Lease, Interest Expense	9	24
Finance Lease cost	41	100
Sublease Income	(99)	(521)
Lease, Cost	$ 1,958	$ 5,844