Leases, Codification Topic 842 (Details) - USD ($)	3 Months Ended		12 Months Ended	27 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021	Dec. 30, 2021
Leases [Abstract]
Operating Lease, Expense	$ 4,358,000	$ 4,867,000
Variable Lease, Cost	1,161,000	1,228,000
Lease, Cost	5,519,000	6,095,000
Operating Lease, Payments	5,044,000	7,566,000
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability	$ 281,000	$ 791,000
Operating Lease, Weighted Average Remaining Lease Term	6 years 3 months 18 days	5 years 10 months 24 days
Operating Lease, Weighted Average Discount Rate, Percent	3.25%	3.44%
Lessee, Operating Lease, Liability, to be Paid, Remainder of Fiscal Year	$ 13,339,000
Lessee, Operating Lease, Liability, to be Paid, Year Four	8,764,000
Lessee, Operating Lease, Liability, to be Paid, Year Five	7,377,000
Lessee, Operating Lease, Liability, to be Paid	90,301,000
Lessee, Operating Lease, Liability, Undiscounted Excess Amount	(8,899,000)
Operating Lease, Liability	81,402,000
Lessee, Lease, Description [Line Items]
Restructuring Charges	0	$ 3,861,000		$ 56,164,000
Lessee, Operating Lease, Liability, to be Paid, After Year Four	25,484,000
Early Surrender Agreement Payment			$ 11,700,000
Gain on Early Termination Agreement			5,700,000
Lease Liability Associated with Surrendered Office			$ 17,400,000
Lessee, Operating Lease, Liability, to be Paid, Year Two	18,688,000
Lessee, Operating Lease, Liability, to be Paid, Year Three	$ 16,649,000
Minimum [Member] | Office Leases [Member]
Leases [Abstract]
Lessee, Operating Lease, Term of Contract	1 year
Lessee, Lease, Description [Line Items]
Lessee, Operating Lease, Term of Contract	1 year
Minimum [Member] | Equipment Lease [Member]
Leases [Abstract]
Lessee, Operating Lease, Term of Contract	1 year
Lessee, Lease, Description [Line Items]
Lessee, Operating Lease, Term of Contract	1 year
Maximum [Member] | Office Leases [Member]
Leases [Abstract]
Lessee, Operating Lease, Term of Contract	11 years 3 months 18 days
Lessee, Lease, Description [Line Items]
Lessee, Operating Lease, Term of Contract	11 years 3 months 18 days
Maximum [Member] | Equipment Lease [Member]
Leases [Abstract]
Lessee, Operating Lease, Term of Contract	4 years 8 months 12 days
Lessee, Lease, Description [Line Items]
Lessee, Operating Lease, Term of Contract	4 years 8 months 12 days