Financial Instruments - Amount of Gains/(Losses) Recognized in Income (Details) - Service revenue - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2022	Mar. 31, 2021
Forward sales commitments
Fair Value, Option, Quantitative Disclosures [Line Items]
Net gain (loss) recognized in earnings	$ 1,503	$ 1,928
IRLCs
Fair Value, Option, Quantitative Disclosures [Line Items]
Net gain (loss) recognized in earnings	$ (887)	$ 166

Amount of increase (decrease) in the fair value of derivatives recognized in the income statement.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4A
-Subparagraph (b)(1)
-URI http://asc.fasb.org/extlink&oid=125515794&loc=SL5618551-113959

Name:	us-gaap_DerivativeGainLossOnDerivativeNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration