XML 31 R81.htm IDEA: XBRL DOCUMENT v2.4.0.8
Employee Benefit Plans - Activity of Restricted Stock Awards (Detail) (Restricted Stock Awards [Member])
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Restricted Stock Awards [Member]
     
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]      
Beginning of period 30,670 29,715 28,925
Granted 11,000 11,000 11,000
Vested (9,160) (8,910) (9,432)
Forfeited (620) (1,135) (778)
Nonvested, end of period 31,890 30,670 29,715