Annual report pursuant to Section 13 and 15(d)

Long-Term Debt and Notes Payable - Principal Maturities of Long-Term Debt (Detail)

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Long-Term Debt and Notes Payable - Principal Maturities of Long-Term Debt (Detail) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Maturities of Long-term Debt and Capital Lease Obligations [Abstract]    
2017 $ 2,636 $ 2,579
2018 2,610  
2019 1,835  
2020 2,096  
2021 138,049  
Thereafter 894  
Long-term debt and capital lease obligations $ 148,120 $ 169,789