Common Stock - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares Authorized (in shares)	100,000,000		100,000,000
Issuance of common stock, net of issuance costs	$ 17,501	$ 92,956
Stock Repurchase Program
Par Value (in dollars per share)	$ 0		$ 0
Shares issued (in shares)	31,129,000		30,589,000
ATM Equity Program
Stock Repurchase Program
Par Value (in dollars per share)	$ 0
Sale of Stock, Cumulative Commissions and Fees Paid	$ 400
Cumulative Proceeds Received on All Transactions	$ 17,500
Shares issued (in shares)	375,720
ATM Equity Program | Maximum [Member] | Scenario, Plan
Stock Repurchase Program
Cumulative Proceeds Received on All Transactions	$ 200,000
Restated Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number	0	10,938,000	9,438	55,938,000
Stock Repurchase Plan [Member]
Stock Repurchase Program
Stock Repurchase Program, Number of Shares Authorized to be Repurchased	2,800,000
Stock Repurchase Program, Authorized Amount	$ 100,000
Treasury Stock, Shares, Acquired	0
Repurchases Since Plan Inception in Year 2000 [Member] | Stock Repurchase Plan [Member]
Stock Repurchase Program
Treasury Stock, Shares, Acquired	2,100,000
Treasury Stock, Value, Acquired, Cost Method	$ 83,300
Northwest Holdings [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Reserved Shares Dividend Reinvestment	454,902
Northwest Holdings [Member] | Employee Stock Purchase Plan Member [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common Stock, Capital Shares Reserved for Future Issuance	156,107