Lease Commitments Leases - Lease Balances (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Jan. 01, 2019	Dec. 31, 2018
Lessee, Lease, Description [Line Items]
Right-of-use assets	$ 50,160	$ 46,162	$ 0
Short-term lease liability		8,892
Long-term lease liabilities	43,827	$ 42,639	$ 0
Total liability	53,852
Right-of-use assets
Lessee, Lease, Description [Line Items]
Right-of-use assets	50,160
Other accrued liabilities
Lessee, Lease, Description [Line Items]
Short-term lease liability	10,025
Long-term lease liability
Lessee, Lease, Description [Line Items]
Long-term lease liabilities	$ 43,827