Lease Accounting - Narrative (Details) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2021 USD ($) lease	Dec. 31, 2019	Dec. 31, 2020 USD ($)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Accounting Standards Update [Extensible List]	us-gaap:AccountingStandardsUpdate201613Member	us-gaap:AccountingStandardsUpdate201613Member
Lease liabilities | $	$ 107,143		$ 112,339
ROU assets | $	$ 93,224		$ 97,859
Building
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Number real estate leases for office locations | lease	36
Building | Minimum
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Term of contract	5 years
Renewal term	5 years
Building | Maximum
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Term of contract	15 years
Renewal term	10 years
Equipment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Number of equipment leases classified as operating | lease	27
Equipment | Minimum
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Term of contract	3 years
Equipment | Maximum
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Term of contract	5 years