XML 76 R61.htm IDEA: XBRL DOCUMENT v3.8.0.1
Derivative Instruments - Hedge Derivatives (Details) - USD ($)
 3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Dec. 31, 2017
Derivative [Line Items]      
Derivative Instruments and Hedges, Assets $ 150,249,000   $ 0
Fair Value Hedging Adjustment 1,579,000   0
Cash flow hedge      
Derivative [Line Items]      
Unrealized Gain (Loss) on Interest Rate Cash Flow Hedges, Pretax, Accumulated Other Comprehensive Income (Loss) $ 1,579,000 $ (143,000)  
Hedging derivative | Cash flow hedge      
Derivative [Line Items]      
Description of Location of Interest Rate Derivatives on Balance Sheet Other liabilities    
Weighted Average Remaining Maturity 3 years 5 months 19 days    
Pay Rate (as percent) 2.78%    
Receive Rate 3 month LIBOR    
Forecasted Notional Amount $ 200,000,000   200,000,000
Cash Flow Hedges Derivative Instruments at Fair Value, Net $ (1,674,000)   (4,583,000)
Hedging derivative | Fair value hedge      
Derivative [Line Items]      
Description of Location of Interest Rate Derivatives on Balance Sheet Other liabilities    
Weighted Average Remaining Maturity 7 years 7 months 21 days    
Pay Rate (as percent) 2.89%    
Receive Rate 3 month LIBOR    
Forecasted Notional Amount $ 154,145,000   0
Fair Value Hedge Assets $ (1,579,000)    
Fair Value Hedge Liabilities     $ 0
Derivative, Description of Hedged Item Securities available-for-sale    
Description of Location of Gain (Loss) on Interest Rate Derivative on Income Statement Interest income on securities    
Description of Location of Interest Rate Fair Value Hedge Derivative on Balance Sheet Interest income on securities    
Increase (Decrease) in Fair Value of Hedged Item in Interest Rate Fair Value Hedge $ (1,579,000) 0  
Gain (Loss) on Fair Value Hedges Recognized in Earnings $ 1,579,000 $ 0