Share-Based Payments (Performance Share Awards (PSAs) Activity) (Details) - PSUs	12 Months Ended
	Dec. 31, 2021 $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares, Issued | shares	422,315
RSUs
Nonvested, Beginning Balance (in shares) | shares	344,271
Granted (in shares) | shares	103,759
Vested (in shares) | shares	(98,088)
Reinvested dividend equivalents (in shares) | shares	1,945
Forfeited (in shares) | shares	(9,501)
Nonvested, Ending Balance (in shares) | shares	342,386
Weighted Average Grant Date Fair Value Per Share
Nonvested, Beginning Balance (in dollars per share) | $ / shares	$ 129.38
Granted (in dollars per share) | $ / shares	208.81
Vested (in dollars per share) | $ / shares	101.24
Reinvested dividend equivalents (in dollars per share) | $ / shares	150.26
Forfeited (in dollars per share) | $ / shares	163.67
Nonvested, Ending Balance (in dollars per share) | $ / shares	160.68
Share-based Compensation Arrangement by Share-based Payment Award, Per Share Weighted Average Price of Shares Purchased | $ / shares	$ 80.55