XML 52 R149.htm IDEA: XBRL DOCUMENT v3.3.0.814
Summary of certificates of deposit by maturity (Detail) - USD ($)
$ in Thousands
Sep. 30, 2015
Dec. 31, 2014
Deposit Liabilities [Line Items]    
TimeDepositMaturitiesYearOne $ 2,064,999  
Time Deposit Maturities, Year Two 3,172,360  
Time Deposit Maturities, Year Three 972,285  
Time Deposit Maturities, Year Four 646,645  
Time Deposit Maturities, Year Five 429,969  
Time Deposit Maturities After Year Five 815,016  
Total certificates of deposit $ 8,101,274 $ 7,474,445