Stock Incentive Plans - Stock Options Outstanding (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified			12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013 $14.88 - 18.07 [Member]	Dec. 31, 2013 $18.08 - 23.36 [Member]	Dec. 31, 2013 $23.37 - 26.06 [Member]	Dec. 31, 2013 $26.07 - 30.04 [Member]	Dec. 31, 2013 $30.05 - 30.36 [Member]	Dec. 31, 2013 $30.37 - 41.92 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Lower Range Limit			$ 14.88	$ 18.08	$ 23.37	$ 26.07	$ 30.05	$ 30.37
Upper Range Limit			$ 18.07	$ 23.36	$ 26.06	$ 30.04	$ 30.36	$ 41.92
Options Outstanding at 12/31/13	6,358	6,035	1,456	1,002	1,745	466	905	784
Weighted Avg. Remaining Contractual Life In Years, Options Outstanding			7 years 5 months 1 day	3 years 15 days	8 years 1 month 6 days	3 years 7 months 2 days	7 years 8 months 1 day	6 years 10 months 2 days
Weighted Average Exercise Price, Options Outstanding			$ 16.37	$ 22.59	$ 23.60	$ 29.39	$ 30.36	$ 33.78
Options Exercisable at 12/31/13	3,911		742	1,001	745	383	454	586
Weighted Average Exercise Price, Options Exercisable	$ 24.75		$ 15.79	$ 22.59	$ 23.54	$ 29.71	$ 30.36	$ 33.76