Commitments and Contingencies Outstanding Operating Lease Liabilities (Details) - USD ($)		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019	Jan. 01, 2019
Future minimum annual lease and service payments
Total lease liability		$ 82,735,000	$ 97,581,000	$ 110,500,000
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability		1,600,000
Equipment Leases
Future minimum annual lease and service payments
2021		283,000
2022		150,000
2023		11,000
2024		0
2025		0
Thereafter		0
Future minimum annual lease and service payments		444,000
Less discount		29,000
Less short-term leases		0
Total lease liability		415,000
Facility Leases
Future minimum annual lease and service payments
2021	[1],[2]	24,520,000
2022	[1],[2]	21,805,000
2023	[1],[2]	18,287,000
2024	[1],[2]	15,017,000
2025	[1],[2]	4,553,000
Thereafter	[1],[2]	5,963,000
Future minimum annual lease and service payments	[1],[2]	90,145,000
Less discount	[1],[2]	7,781,000
Less short-term leases		44,000
Total lease liability	[1],[2]	$ 82,320,000

[1] During the year ended December 31, 2020, the Company recognized an increase of $1.6 million of operating right-of-use assets and leases liabilities related to for facility leases.

[2] The Company has entered into various agreements to sublease certain of its premises.