Lease Agreements - Company as Lessee - Narrative and Components of Leases (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Lessee, Lease, Description [Line Items]
Office lease, renewal term	5 years
Operating lease right-of-use assets	$ 68,972	$ 72,143
Total leased assets	68,972	72,143
Operating lease liabilities	70,675	74,037
Total lease liabilities	70,675	74,037
Lease, Cost [Abstract]
Operating lease cost	6,729	6,749
Variable lease cost	1,639	1,436
Short-term lease cost	287	432
Sublease income	(438)	(438)
Total lease cost	8,217	8,179
Operating lease right-of-use assets
Lessee, Lease, Description [Line Items]
Operating lease right-of-use assets	68,972	72,143
Operating lease liabilities
Lessee, Lease, Description [Line Items]
Operating lease liabilities	$ 70,675	$ 74,037
Minimum
Lessee, Lease, Description [Line Items]
Office lease term of contract	5 years
Ground lease term	20 years
Ground lease, renewal term	10 years
Maximum
Lessee, Lease, Description [Line Items]
Office lease term of contract	10 years
Ground lease term	85 years
Ground lease, renewal term	39 years