Commitments and Contingencies Outstanding Operating Lease Liabilities (Details) - USD ($)		3 Months Ended
		Mar. 31, 2021	Dec. 31, 2020
Future minimum annual lease and service payments
Total lease liability		$ 81,400,000	$ 82,735,000
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability		5,300,000
Equipment Leases
Future minimum annual lease and service payments
2021		207,000
2022		150,000
2023		11,000
2024		0
2025		0
Thereafter		0
Future minimum annual lease and service payments		368,000
Less discount		21,000
Less short-term leases		0
Total lease liability		347,000
Facility Leases
Future minimum annual lease and service payments
2021	[1],[2]	19,065,000
2022	[1],[2]	22,612,000
2023	[1],[2]	19,123,000
2024	[1],[2]	15,883,000
2025	[1],[2]	5,446,000
Thereafter	[1],[2]	7,862,000
Future minimum annual lease and service payments	[1],[2]	89,991,000
Less discount	[1],[2]	8,927,000
Less short-term leases		11,000
Total lease liability	[1],[2]	$ 81,053,000

[1] During the three months ended March 31, 2021, the Company recognized an increase of $5.3 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.