Effect of Derivative and Hedging Activity, on Consolidated Statements of Income (Detail) - USD ($) $ in Thousands |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2016 |
Sep. 30, 2015 |
Sep. 30, 2016 |
Sep. 30, 2015 |
|
| Derivatives designated as hedges | ||||
| Derivative, Gain (Loss) on Derivative, Net | $ 31 | $ 33 | $ 86 | $ 91 |
| Interest Rate Swaps Agreement | Designated as Hedging Instrument | Interest And Fee | ||||
| Derivatives designated as hedges | ||||
| Derivative, Gain (Loss) on Derivative, Net | $ 31 | $ 33 | $ 86 | $ 91 |