Supplemental Cash Flow Disclosures - Non-cash Investing and Financing Activities (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Cash paid during the year for:
Interest	$ 15,818	$ 18,943	$ 23,022
Income taxes	8,331	10,700	3,080
Non-cash investing and financing activities:
Loans transferred to other real estate owned and repossessed assets	8,257	5,061	12,326
Other Real Estate Owned and Settled Out of Period	0	0	348
Fair value of loans transferred from held to maturity to available for sale	3,196	3,035	20,135
Gross (decrease) increase in market value adjustment to securities available for sale	2,949	24,601	(33,792)
Gross increase in market value adjustment to derivatives	401	472	0
Investments committed to purchase, not settled	694	0	0
Net assets acquired through acquisition	463	0	0
Contribution of premises	$ 0	$ 682	$ 0