XML 131 R114.htm IDEA: XBRL DOCUMENT v3.8.0.1
Derivative Financial Instruments - Fair Value of Derivative Instruments (Detail) - Derivatives Not Designated as Hedging Instruments [Member] - USD ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Other Liabilities [Member]    
Derivatives, Fair Value [Line Items]    
Liability Derivatives $ 3,211 $ 5,783
Other Liabilities [Member] | Interest Rate Swaps [Member]    
Derivatives, Fair Value [Line Items]    
Liability Derivatives 3,211 5,783
Other Assets [Member]    
Derivatives, Fair Value [Line Items]    
Asset Derivatives 3,211 5,783
Other Assets [Member] | Interest Rate Swaps [Member]    
Derivatives, Fair Value [Line Items]    
Asset Derivatives $ 3,211 $ 5,783