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Share Repurchases (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Feb. 19, 2020	Feb. 25, 2014
Equity, Class of Treasury Stock [Line Items]
Value of common stock repurchases	$ 82,000,000	$ 51,000,000	$ 4,000,000
Number of shares (in shares)	148,535	168,671
Average price per share (usd per share)	$ 32.39	$ 25.65
Value of common stock repurchases	$ 4,000,000	$ 4,000,000
Number of shares (in shares)	2,022,878	1,992,105
Average price per share (usd per share)	$ 40.85	$ 25.70
Value of common stock repurchases	$ 82,000,000	$ 51,000,000
Stock repurchase program, authorized amount				$ 350,000,000	$ 350,000,000
Share Repurchase Program 2014
Equity, Class of Treasury Stock [Line Items]
Number of shares (in shares)	1,874,343	1,823,434
Average price per share (usd per share)	$ 41.52	$ 25.70
Value of common stock repurchases	$ 78,000,000	$ 47,000,000

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