Stock-Based Compensation Plans (Narrative) (Detail)	9 Months Ended		9 Months Ended		9 Months Ended			12 Months Ended	9 Months Ended	12 Months Ended	9 Months Ended
	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2014 Restricted Stock [Member]	Sep. 30, 2014 Time Based Restricted Stock Awards [Member]	Sep. 30, 2014 Time Based Restricted Stock Awards [Member] Minimum [Member]	Sep. 30, 2014 Time Based Restricted Stock Awards [Member] Maximum [Member]	Sep. 30, 2014 Performance Based Restricted Stock Awards [Member]	Dec. 31, 2013 Performance Based Restricted Stock Awards [Member] Minimum [Member] Vesting Period 1 [Member]	Sep. 30, 2014 Performance Based Restricted Stock Awards [Member] Minimum [Member] Vesting Period 2 [Member]	Dec. 31, 2013 Performance Based Restricted Stock Awards [Member] Maximum [Member] Vesting Period 1 [Member]	Sep. 30, 2014 Performance Based Restricted Stock Awards [Member] Maximum [Member] Vesting Period 2 [Member]	Sep. 30, 2014 Stock options [Member]	Sep. 30, 2014 Stock options [Member] Minimum [Member]	Sep. 30, 2014 Stock options [Member] Maximum [Member]	Sep. 30, 2014 Non-Qualified Stock Options [Member]	Sep. 30, 2014 Incentive Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period			1 year		1 year	5 years	3 years						3 years	4 years
Shares authorized				100,000
Vesting percentage							50.00%	0.00%	0.00%	200.00%	150.00%
Maximum contractual term												10 years
Options granted	0
Number of options outstanding	2,122,576	2,325,797													1,942,570	180,006