Quarterly report pursuant to Section 13 or 15(d)

Derivatives - Additional Information (Details)

v3.10.0.1
Derivatives - Additional Information (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Dec. 31, 2017
Derivatives, Fair Value [Line Items]          
Unrealized gain (loss) on derivatives, net of tax $ 8,495 $ (543) $ 30,328 $ (5,016)  
Recognized interest expense on derivatives into earnings, net of tax (697) 138 (2,352) 1,042  
Derivative assets 27,600   27,600   $ 1,900
Derivative liabilities 100   100   $ 8,600
Interest rate swaps          
Derivatives, Fair Value [Line Items]          
Unrealized gain (loss) on derivatives, net of tax 8,500 (500) 30,300 (5,000)  
Unrealized gain (loss), applicable tax expense (benefit) (3,100) (300) (10,700) (3,200)  
Recognized interest expense on derivatives into earnings, net of tax 700 100 2,400 1,000  
Recognized interest expense on derivatives into earnings, tax expense (benefit) (300) $ 100 (800) $ 700  
Accelerated reclassification of gains 6,900        
Additional amount to be classified as an increase to interest expense during next 12 months $ 1,800   $ 1,800