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Long-Term Debt - Summary of Interest Received and Paid under Term of Cash Flow Swap (Detail) | 6 Months Ended
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Jun. 30, 2017 USD ($)
Derivatives, Fair Value [Line Items] |
Receive Rate | one-month LIBOR
Variable Interest Rate | 1.224%
Cash Flow Swap [Member] |
Derivatives, Fair Value [Line Items] |
Notional Amount | $ 2,200,000
Pay Rate | 7.10%
Receive Rate | one-month LIBOR + 1.50%
Maturing Date | Jul. 10, 2017
Variable Interest Rate | 1.50%
Cash Flow Swap 1 [Member] |
Derivatives, Fair Value [Line Items] |
Notional Amount | $ 7,000,000
Pay Rate | 4.655%
Receive Rate | one-month LIBOR
Maturing Date | Dec. 10, 2017
Cash Flow Swap 2 [Member] |
Derivatives, Fair Value [Line Items] |
Notional Amount | $ 6,400,000
Pay Rate | 6.86%
Receive Rate | one-month LIBOR + 1.25%
Maturing Date | Aug. 01, 2017
Variable Interest Rate | 1.25%
Cash Flow Swap 3 [Member] |
Derivatives, Fair Value [Line Items] |
Notional Amount | $ 5,900,000
Pay Rate | 6.41%
Receive Rate | one-month LIBOR + 1.25%
Maturing Date | Sep. 12, 2017
Variable Interest Rate | 1.25%
Cash Flow Swap 4 [Member] |
Derivatives, Fair Value [Line Items] |
Notional Amount | $ 50,000,000
Pay Rate | 1.32%
Receive Rate | one-month LIBOR
Maturing Date | Jul. 01, 2017
Cash Flow Swap 5 [Member] |
Derivatives, Fair Value [Line Items] |
Notional Amount | $ 250,000,000
Pay Rate | 1.887%
Receive Rate | one-month LIBOR
Maturing Date | Jun. 30, 2018
Cash Flow Swap 6 [Member] |
Derivatives, Fair Value [Line Items] |
Notional Amount | $ 25,000,000
Pay Rate | 2.08%
Receive Rate | one-month LIBOR
Maturing Date | Jul. 01, 2017
Cash Flow Swap 7 [Member] |
Derivatives, Fair Value [Line Items] |
Notional Amount | $ 100,000,000
Pay Rate | 1.56%
Receive Rate | one-month LIBOR
Maturing Date | Jul. 01, 2017
Cash Flow Swap 8 [Member] |
Derivatives, Fair Value [Line Items] |
Notional Amount | $ 125,000,000
Pay Rate | 1.303%
Receive Rate | one-month LIBOR
Maturing Date | Jul. 01, 2017
Cash Flow Swap 9 [Member] |
Derivatives, Fair Value [Line Items] |
Notional Amount | $ 125,000,000
Pay Rate | 1.90%
Receive Rate | one-month LIBOR
Maturing Date | Jul. 01, 2018
Cash Flow Swap 10 [Member] |
Derivatives, Fair Value [Line Items] |
Notional Amount | $ 50,000,000
Pay Rate | 2.32%
Receive Rate | one-month LIBOR
Maturing Date | Jul. 01, 2019
Cash Flow Swap 11 [Member] |
Derivatives, Fair Value [Line Items] |
Notional Amount | $ 200,000,000
Pay Rate | 2.313%
Receive Rate | one-month LIBOR
Maturing Date | Jul. 01, 2019
Cash Flow Swap 12 [Member] |
Derivatives, Fair Value [Line Items] |
Notional Amount | $ 100,000,000
Pay Rate | 1.384%
Receive Rate | one-month LIBOR
Maturing Date | Jul. 01, 2020
Cash Flow Swap 13 [Member] |
Derivatives, Fair Value [Line Items] |
Notional Amount | $ 125,000,000
Pay Rate | 1.158%
Receive Rate | one-month LIBOR
Maturing Date | Jul. 01, 2019
Cash Flow Swap 14 [Member] |
Derivatives, Fair Value [Line Items] |
Notional Amount | $ 150,000,000
Pay Rate | 1.31%
Receive Rate | one-month LIBOR
Maturing Date | Jul. 01, 2020
Cash Flow Swap 15 [Member] |
Derivatives, Fair Value [Line Items] |
Notional Amount | $ 125,000,000
Pay Rate | 1.02%
Receive Rate | one-month LIBOR
Maturing Date | Jul. 01, 2018

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