Leases Operating lease costs (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Lessee, Lease, Description [Line Items]
Operating Lease Right-of-use Asset, Amortization	$ 25,150	$ 25,186	$ 0
Real Estate [Member]
Lessee, Lease, Description [Line Items]
Operating Lease Right-of-use Asset, Amortization	23,271	23,308
Operating Lease, Interest Expense	15,142	15,815
Equipment [Member]
Lessee, Lease, Description [Line Items]
Operating Lease Right-of-use Asset, Amortization	1,879	1,878
Operating Lease, Interest Expense	$ 197	$ 227