Leases Lease Textuals (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Leases [Abstract]
Operating Lease, Expense	$ 39,190	$ 38,900	$ 36,900
Lessee Operating Lease Lease Not Yet Commenced Total Contract Value	23,300
Amortization of Operating Lease Right-of-Use Asset	31,100
Change in lease liability cash flow	30,100
Operating Lease, Payments	33,500
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability	$ 25,700