Quarterly report pursuant to Section 13 or 15(d)

Loans and Leases - Schedule of Changes in Outstanding Balance and Carrying Amount of PCI Loans (Detail)

v3.8.0.1
Loans and Leases - Schedule of Changes in Outstanding Balance and Carrying Amount of PCI Loans (Detail) - USD ($)
$ in Thousands
9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Carrying Amount    
Balance at beginning of period $ 3,812,340  
Balance at end of period 4,162,863  
PCI Loans and Leases [Member]    
Carrying Amount    
Balance at beginning of period 8,892 $ 14,573
Accretion 501 933
Payments received (1,770) (6,408)
Disposal/transfer to OREO 110 1,143
Change in expected cash flows, net 0 0
Loan loss (provision) income 177 (234)
Balance at end of period 7,910 10,007
Accretable Yield    
Balance at beginning of period (5,677) (5,944)
Accretion 501 933
Payments received 0 0
Disposal/transfer to OREO 0 0
Change in expected cash flows, net (306) (900)
Loan loss (provision) income 0 0
Balance at end of period $ (5,482) $ (5,911)