Annual report pursuant to Section 13 and 15(d)

Long-Term Borrowings - Aggregate Maturities of Long-Term Borrowings (Detail)

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Long-Term Borrowings - Aggregate Maturities of Long-Term Borrowings (Detail) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Debt Disclosure [Abstract]    
2017 $ 1,783  
2018 1,801  
2019 1,666  
2020 63,692  
Long-term borrowings $ 68,942 $ 84,595