Leases, Codification Topic 842 (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Leases [Abstract]
Lessee, Operating Lease, Term of Contract	19 years 8 months 12 days
Lessee, Operating Lease, Option to Extend	10
Operating Lease, Expense	$ 31,704	$ 30,991
Finance Lease, Right-of-Use Asset, Amortization	1,313	382
Finance Lease, Interest Expense	281	76
Short-term Lease, Cost	24,361	26,843
Lease, Cost	57,659	58,292
Operating Lease, Payments	27,953	25,272
Finance Lease, Interest Payment on Liability	281	76
Finance Lease, Principal Payments	989	306	$ 0
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability	10,159	17,078
Right-of-Use Asset Obtained in Exchange for Finance Lease Liability	$ 10,034	$ 7,434
Operating Lease, Weighted Average Remaining Lease Term	4 years 8 months 12 days	5 years 1 month 6 days
Finance Lease, Weighted Average Remaining Lease Term	12 years 6 months	6 years 8 months 12 days
Operating Lease, Weighted Average Discount Rate, Percent	3.40%	3.60%
Finance Lease, Weighted Average Discount Rate, Percent	2.80%	2.80%
Lessee, Operating Lease, Liability, Payments, Due Next Rolling Twelve Months	$ 30,111
Finance Lease, Liability, Payments, Due in Next Rolling Twelve Months	1,744
Finance Lease, Liability, Payments, Due in Rolling Year Two	1,749
Lessee, Operating Lease, Liability, Payments, Due in Rolling Year Two	19,500
Finance Lease, Liability, Payments, Due in Rolling Year Three	1,754
Lessee, Operating Lease, Liability, Payments, Due in Rolling Year Three	14,918
Finance Lease, Liability, Payments, Due in Rolling Year Four	1,759
Lessee, Operating Lease, Liability, Payments, Due in Rolling Year Four	8,825
Finance Lease, Liability, Payments, Due in Rolling Year Five	1,764
Lessee, Operating Lease, Liability, Payments, Due in Rolling Year Five	4,970
Finance Lease, Liability, Payments, Due in Rolling after Year Five	10,742
Lessee, Operating Lease, Liability, Payments, Due after Rolling Year Five	6,641
Finance Lease, Liability, Payment, Due	19,512
Lessee, Operating Lease, Liability, to be Paid	84,965
Finance Lease, Liability, Undiscounted Excess Amount	3,339
Lessee, Operating Lease, Liability, Undiscounted Excess Amount	5,544
Finance Lease, Liability	16,173
Operating Lease, Liability	72,656
Operating Lease Member [Member]
Leases [Abstract]
Short-term Lease Commitment, Amount	6,765
Lessee, Lease, Description [Line Items]
Short-term Lease Commitment, Amount	6,765
Finance Leases Member [Member]
Leases [Abstract]
Short-term Lease Commitment, Amount	0
Lessee, Lease, Description [Line Items]
Short-term Lease Commitment, Amount	$ 0