XML 60 R49.htm IDEA: XBRL DOCUMENT v3.8.0.1
Financial Instruments - Summary of Effects of Interest Rate Swaps (Detail) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Derivatives, Fair Value [Line Items]        
Gain (Loss) Recognized in AOCL, net of tax $ 11 $ 247 $ 82 $ (516)
Interest Rate Swap [Member] | Interest Expense [Member]        
Derivatives, Fair Value [Line Items]        
Gain (Loss) Recognized in AOCL, net of tax 11 247 82 (516)
Gain Reclassified from AOCL into Expense $ 20 $ 103 $ 120 $ 318