Stock-Based Compensation Plans (Vested Restricted Stocks) (Details) - $ / shares	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Market price at vesting date (in dollars per share)	$ 26	$ 25	$ 22
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted (in shares)	832,948	1,133,031	1,042,169
Restricted Stock | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Market price at vesting date (in dollars per share)	$ 20.68	$ 20.40
Restricted Stock | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Market price at vesting date (in dollars per share)	$ 31.08	$ 28.98
Restricted Stock | 1 Year
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted (in shares)	42,074	39,627	0
Market price at vesting date (in dollars per share)		$ 22.19	$ 0
Restricted Stock | 1 Year | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Market price at vesting date (in dollars per share)	$ 22.16
Restricted Stock | 1 Year | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Market price at vesting date (in dollars per share)	$ 26.94
Restricted Stock | 2 Year
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted (in shares)	21,669	0	0
Market price at vesting date (in dollars per share)		$ 0	$ 0
Restricted Stock | 2 Year | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Market price at vesting date (in dollars per share)	$ 23.88
Restricted Stock | 2 Year | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Market price at vesting date (in dollars per share)	$ 26.94
Restricted Stock | 3 Years
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted (in shares)	119,504	64,718	0
Market price at vesting date (in dollars per share)		$ 20.40	$ 0
Restricted Stock | 3 Years | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Market price at vesting date (in dollars per share)	$ 23.88		20.21
Restricted Stock | 3 Years | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Market price at vesting date (in dollars per share)	$ 31.08		$ 23.14
Restricted Stock | 4 Years
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted (in shares)	479,346	773,698	762,749
Restricted Stock | 4 Years | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Market price at vesting date (in dollars per share)	$ 20.68	$ 20.68	$ 20.21
Restricted Stock | 4 Years | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Market price at vesting date (in dollars per share)	$ 28.98	$ 28.98	$ 23.14
Restricted Stock | 5 Years
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted (in shares)	170,355	254,988	279,420
Restricted Stock | 5 Years | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Market price at vesting date (in dollars per share)	$ 20.68	$ 20.68	$ 20.21
Restricted Stock | 5 Years | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Market price at vesting date (in dollars per share)	$ 28.98	$ 28.98	$ 23.14