Share-Based Compensation Plans - Summary of Activity Related to Restricted Stock Granted under Company's Incentive Plan (Details) - Restricted Stock Grants shares in Thousands	3 Months Ended
	Mar. 31, 2020 $ / shares shares
Total Shares
Total Shares, Outstanding, Beginning Balance | shares	422
Total Shares, Granted | shares	164
Total Shares, Vested | shares	(153)
Total Shares, Forfeited, canceled or expired | shares	(10)
Total Shares, Outstanding, Ending Balance | shares	423
Weighted Average Grant Date
Weighted Average Grant Date Fair Value, Beginning Balance | $ / shares	$ 76.43
Weighted Average Grant Date Fair Value, Granted | $ / shares	84.07
Weighted Average Grant Date Fair Value, Vested | $ / shares	64.37
Weighted Average Grant Date Fair Value, Forfeited, canceled or expired | $ / shares	85.74
Weighted Average Grant Date Fair Value, Ending Balance | $ / shares	$ 83.53