Loans - Non-Performing Assets (Detail) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Receivables [Abstract]
Non-accrual Non-PCI loans	$ 12,341	$ 19,118
Loans 90 days or more past due and still accruing	0	0
Total non-performing loans	12,341	19,118
OREO	11,846	8,511
Total non-performing assets	$ 24,187	$ 27,629