Consolidated Statements of Stockholders' Equity (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Statement of Stockholders' Equity [Abstract]
Stock Repurchased and Retired During Period, Shares	3,578,743	43,560	24,271
Stock issued during period, new issues (in shares)	19,491	4,356,973	3,848,929
Stock issued during period, RSU (in shares)	332,085	212,587	214,892
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested Options Forfeited, Number of Shares	34,912	46,198	43,079
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period	111,539	143,222	161,217
Shares tendered in payment of option price and income tax withholding amounts, shares	26,124	47,971	38,450
Dividends declared (in usd per share)	$ 2.00	$ 1.24	$ 1.12