Acquisitions - Recognized Identified Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Oct. 01, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Assets:
Goodwill	$ 338,406		$ 290,366	$ 290,366	$ 290,366
Westchester
Assets:
Cash and cash equivalents		$ 1,197
Intangible assets		144,400
Goodwill		23,040
Other assets		4,997
Total Assets		173,634
Liabilities
Accounts payable and accrued liabilities		4,300
Total liabilities		4,300
Total Net Assets Acquired		$ 169,334