Commitments and Contingencies Outstanding Operating Lease Liabilities (Details) - USD ($)		9 Months Ended
		Sep. 30, 2021	Dec. 31, 2020
Future minimum annual lease and service payments
Total lease liability		$ 94,383,000	$ 82,735,000
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability		30,100,000
Equipment Leases
Future minimum annual lease and service payments
2021		66,000
2022		150,000
2023		11,000
2024		0
2025		0
Thereafter		0
Future minimum annual lease and service payments		227,000
Less discount		6,000
Less short-term leases		0
Total lease liability		221,000
Facility Leases
Future minimum annual lease and service payments
2021	[1],[2]	4,646,000
2022	[1],[2]	25,076,000
2023	[1],[2]	22,807,000
2024	[1],[2]	20,006,000
2025	[1],[2]	9,461,000
Thereafter	[1],[2]	24,368,000
Future minimum annual lease and service payments	[1],[2]	106,364,000
Less discount	[1],[2]	12,183,000
Less short-term leases		19,000
Total lease liability	[1],[2]	$ 94,162,000

[1] During the nine months ended September 30, 2021, the Company recognized an increase of $30.1 million of operating right-of-use assets and leases liabilities related to facility leases.

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