Supplemental Cash Flow Disclosures - Non-cash Investing and Financing Activities (Detail) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Cash paid during the period for:
Interest	$ 7,893	$ 10,024
Income Taxes Paid, Net	4,000	3,700
Non-cash investing and financing activities:
Loans Transferred to Other Real Estate Owned and Repossessions	2,315	2,726
Fair value of loans transferred from held to maturity to held for sale	3,071	3,035
Gross increase in market value adjustment to securities available for sale	6,036	22,397
Gross increase in market value adjustment to derivatives	662	0
Investments committed to purchase not settled	1,817	2,732
Unsettled treasury stock repurchases	0	38
Unsettled Bank Owned Life Insurance Proceeds	$ 0	$ 1,062