Results of Qualitative Analysis for Annual Testing (Detail) (Current year)	12 Months Ended
	Dec. 31, 2013
Atlanta Georgia
Goodwill And Other Intangibles [Line Items]
Excess fair value estimate	13.60%
Boston Massachusetts
Goodwill And Other Intangibles [Line Items]
Excess fair value estimate	6.90%
Chicago Illinois
Goodwill And Other Intangibles [Line Items]
Excess fair value estimate	6.40%
Cleveland Ohio
Goodwill And Other Intangibles [Line Items]
Excess fair value estimate	4.60%
Colorado Springs Colorado
Goodwill And Other Intangibles [Line Items]
Excess fair value estimate	82.50%
Columbus Ohio
Goodwill And Other Intangibles [Line Items]
Excess fair value estimate	6.00%
Dallas
Goodwill And Other Intangibles [Line Items]
Excess fair value estimate	10.90%
Detroit Michigan
Goodwill And Other Intangibles [Line Items]
Excess fair value estimate	2.90%
Greenville South Carolina
Goodwill And Other Intangibles [Line Items]
Excess fair value estimate	8.50%
Honolulu Hawaii
Goodwill And Other Intangibles [Line Items]
Excess fair value estimate	6.30%
Los Angeles California
Goodwill And Other Intangibles [Line Items]
Excess fair value estimate	107.40%
Louisville Kentucky
Goodwill And Other Intangibles [Line Items]
Excess fair value estimate	8.00%
Minneapolis Minnesota
Goodwill And Other Intangibles [Line Items]
Excess fair value estimate	85.80%
Omaha Nebraska
Goodwill And Other Intangibles [Line Items]
Excess fair value estimate	1.10%
Phoenix Arizona
Goodwill And Other Intangibles [Line Items]
Excess fair value estimate	17.40%
Portland Oregon
Goodwill And Other Intangibles [Line Items]
Excess fair value estimate	6.90%
Sacramento California
Goodwill And Other Intangibles [Line Items]
Excess fair value estimate	1.60%