Acquisitions (Details) - USD ($) $ in Thousands			12 Months Ended
	Aug. 31, 2021	Aug. 06, 2021	Dec. 31, 2021	[1]	Dec. 31, 2020
Business Acquisition [Line Items]
Goodwill and intangible assets, acquisitions			$ 350,136		$ 39,178
Westpac Lenders Mortgage Insurance Limited
Business Acquisition [Line Items]
Term of business exclusivity agreement	10 years
Somerset
Business Acquisition [Line Items]
Goodwill and intangible assets, acquisitions		$ 350,100

[1] Certain amounts for the Company’s 2021 acquisitions are considered provisional.