Stock-Based Compensation and Stock Purchase Plans - Stock Options - Additional Information (Detail) (Options [Member], USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Schedule Of Share Based Compensation Arrangements [Line Items]
Stock options remained available for grant	52,333	85,006
Vesting term	3 years
Options exercisable, shares	2,905,000	2,500,000	2,200,000
Options exercisable, weighted-average exercise price	$ 9.85	$ 10.12	$ 10.15
Option vesting period	3 years
Stock options awarded to employees and executive officers	920,004	451,298	498,500
Number of options issued	20,000
Options issued, exercise price	$ 6.10
Consecutive trading days for options to vest	10 days
Total intrinsic value of stock options exercised	$ 0.1	$ 0.3	$ 1.4
Total fair value shares vested	1.9	1.9	2.7
Total future compensation cost related to unvested stock option awards that are expected to vest	$ 3.1
Expected weighted average period of recognizing compensation cost	2 years 1 month 6 days
2001 Long term Incentive Plan [Member]
Schedule Of Share Based Compensation Arrangements [Line Items]
Number of options issued	85,000
Options issued, exercise price	$ 10.80
Exercise price $10.91 [Member] | 2004 Long term Incentive Plan [Member]
Schedule Of Share Based Compensation Arrangements [Line Items]
Number of options issued	225,000
Options issued, exercise price	$ 10.91
Exercise price $10.80 [Member] | 2004 Long term Incentive Plan [Member]
Schedule Of Share Based Compensation Arrangements [Line Items]
Number of options issued	165,000
Options issued, exercise price	$ 10.80
Minimum [Member]
Schedule Of Share Based Compensation Arrangements [Line Items]
Stock options granted under the plans, expiry period from date of grant	5 years
Average closing price of common stock	$ 20
Maximum [Member]
Schedule Of Share Based Compensation Arrangements [Line Items]
Stock options granted under the plans, expiry period from date of grant	10 years