XML 74 R63.htm IDEA: XBRL DOCUMENT v3.5.0.2
Derivative Instruments - Amounts and Locations of Activity Related to Interest Rate Swaps Designated as Cash Flow Hedges within Corporation's Consolidated Balance Sheet and Statement of Income (Detail) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Dec. 31, 2015
Derivative [Line Items]          
Interest rate contracts $ 87 $ (19) $ 92 $ 25  
Accrued Interest and Other Liabilities [Member]          
Derivative [Line Items]          
Interest rate contract, fair value (595)   (595)   $ (736)
Interest Expense - Subordinated Debentures [Member]          
Derivative [Line Items]          
Interest expense, Fair Value (84) (95) (260) (284)  
Other Income [Member]          
Derivative [Line Items]          
Other income $ 0 $ 0 $ 0 $ 0