XML 67 R57.htm IDEA: XBRL DOCUMENT v3.10.0.1
Derivative Financial Instruments - Carrying Amount and Adjustment (Details) - USD ($)
$ in Thousands
9 Months Ended 12 Months Ended
Sep. 30, 2018
Dec. 31, 2017
Derivative Instruments and Hedging Activities Disclosures [Line Items]    
Amortized cost, at fair value $ 491,726 $ 481,357
Derivatives designated as hedging instruments    
Derivative Instruments and Hedging Activities Disclosures [Line Items]    
Amortized cost, at fair value 88,200 50,000
Loans | Derivatives designated as hedging instruments    
Derivative Instruments and Hedging Activities Disclosures [Line Items]    
Carrying amount of the hedged assets 366,948 91,653
Cumulative amount of fair value hedging adjustment included in the carrying amount of the hedged assets (5,152) 263
Securities available-for-sale | Derivatives designated as hedging instruments    
Derivative Instruments and Hedging Activities Disclosures [Line Items]    
Carrying amount of the hedged assets 159,215 92,230
Cumulative amount of fair value hedging adjustment included in the carrying amount of the hedged assets $ (2,339) $ 8