Annual report pursuant to Section 13 and 15(d)

Fair Value Measurements - Assets and Liabilities Carried at Fair Value Measured on Recurring Basis (Detail)

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Fair Value Measurements - Assets and Liabilities Carried at Fair Value Measured on Recurring Basis (Detail)
$ in Thousands
Dec. 31, 2017
USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
Interest rate swaps, Asset $ 205
Interest Rate Swap [Member] | Fair Value, Measurements, Recurring [Member]  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
Interest rate swaps, Asset 205
Interest Rate Swap [Member] | Level 2 [Member] | Fair Value, Measurements, Recurring [Member]  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
Interest rate swaps, Asset $ 205