Share-Based Compensation - Shares Authorized, Available for Future Grant and Outstanding Under Each Plans (Detail) In Thousands, unless otherwise specified	Dec. 31, 2013
Equity Incentive Plan [Line Items]
Authorized	45,300
Available	11,516
Outstanding	5,372	[1]
1995 Employee Stock Incentive Plan
Equity Incentive Plan [Line Items]
Authorized	10,800
Outstanding	234	[1]
1996 Stock Option Plan
Equity Incentive Plan [Line Items]
Authorized	9,000
Outstanding	100	[1]
2001 Directors Plan
Equity Incentive Plan [Line Items]
Authorized	500	[2]
Available	10	[2]
Outstanding	144	[1],[2]
2004 Plan
Equity Incentive Plan [Line Items]
Authorized	24,000
Available	10,567
Outstanding	4,834	[1]
2013 Directors Plan
Equity Incentive Plan [Line Items]
Authorized	1,000
Available	939
Outstanding	60	[1]

[1] Outstanding shares underlying restricted stock units granted under the 2001 Directors Plan, 2004 Plan and 2013 Directors Plan include accrued incremental dividend equivalent rights.

[2] The Company’s 2001 Non-Employee Directors Plan expired on December 31, 2011. The shares available for grant under this plan are only available to satisfy incremental dividend equivalent rights for outstanding awards.