Derivatives and Hedging Activities - Summary of Effect of Derivative Instruments on Income Statement (Detail) - Derivatives Not Designated as Hedging Instruments [Member] - USD ($) $ in Thousands |
12 Months Ended | ||
---|---|---|---|
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
|
Derivative Instruments, Gain (Loss) [Line Items] | |||
Total gain (loss) on derivative financial instruments | $ 495 | $ 3 | $ (162) |
Interest Rate Product [Member] | |||
Derivative Instruments, Gain (Loss) [Line Items] | |||
Total gain (loss) on derivative financial instruments | $ 495 | $ 3 | $ (162) |