Stock-Based Compensation Plans (Summary Of Restricted Stock Activity) (Detail) (USD $)	12 Months Ended
	Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward]
Options outstanding, at end of period, Weighted-Average Exercise Price (in dollars per share)	$ 26.97
Time Based Restricted Stock Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward]
Restricted stock, at beginning of period, Number of Shares	249,294
Restricted stock, at beginning of period, Weighted-average Grant Date Fair Value (in dollars per share)	$ 22.12
Granted, Number of Shares	246,133
Granted, Weighted-average Grant Date Fair Value (in dollars per share)	$ 23.26
Vested, Number of Shares	(205,601)	[1]
Vested, Weighted-average Grant Date Fair Value (in dollars per share)	$ 22.36	[1]
Forfeited/Modified Number of Shares	(22,707)
Forfeited/Modified Weighted-average Grant Date Fair Value (in dollars per share)	$ 22.40
Restricted stock, at end of period, Number of Shares	267,119
Options outstanding, at end of period, Weighted-Average Exercise Price (in dollars per share)	$ 22.96
Time Based Restricted Stock Unit Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward]
Restricted stock, at beginning of period, Number of Shares	33,742
Restricted stock, at beginning of period, Weighted-average Grant Date Fair Value (in dollars per share)	$ 22.12
Granted, Number of Shares	0
Granted, Weighted-average Grant Date Fair Value (in dollars per share)	$ 0.00
Vested, Number of Shares	(22,259)	[1]
Vested, Weighted-average Grant Date Fair Value (in dollars per share)	$ 22.75	[1]
Forfeited/Modified Number of Shares	(9,778)
Forfeited/Modified Weighted-average Grant Date Fair Value (in dollars per share)	$ 21.67
Restricted stock, at end of period, Number of Shares	1,705
Options outstanding, at end of period, Weighted-Average Exercise Price (in dollars per share)	$ 22.75
Performance Based Restricted Stock Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward]
Restricted stock, at beginning of period, Number of Shares	94,408
Restricted stock, at beginning of period, Weighted-average Grant Date Fair Value (in dollars per share)	$ 25.44
Granted, Number of Shares	163,519
Granted, Weighted-average Grant Date Fair Value (in dollars per share)	$ 24.04
Vested, Number of Shares	(84,652)	[1]
Vested, Weighted-average Grant Date Fair Value (in dollars per share)	$ 24.74	[1]
Forfeited/Modified Number of Shares	(34,825)
Forfeited/Modified Weighted-average Grant Date Fair Value (in dollars per share)	$ 24.55
Restricted stock, at end of period, Number of Shares	138,450
Options outstanding, at end of period, Weighted-Average Exercise Price (in dollars per share)	$ 24.43

[1] Vested for purposes of recording compensation expense