v3.7.0.1
Interest Rate Swaps - Additional Information (Detail) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Dec. 31, 2016
Derivative [Line Items]          
Interest rate swaps expected to be reclassified     $ 4,007    
Interest Rate Swap          
Derivative [Line Items]          
Amount of loss recognized in income on derivatives, ineffectiveness $ 332 $ 1,668 $ 332 $ 5,210 $ 0