Annual report pursuant to Section 13 and 15(d)

Variations from Federal Statutory Rate (Parenthetical) (Detail)

v3.3.1.900
Variations from Federal Statutory Rate (Parenthetical) (Detail)
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Reconciliation Of Income Taxes [Line Items]      
Expected federal income tax expense (benefit), statutory rate 34.00% 34.00% 34.00%