Quarterly report pursuant to Section 13 or 15(d)

Derivative Financial Instruments - Summary of Interest Rate Swap Agreements (Detail)

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Derivative Financial Instruments - Summary of Interest Rate Swap Agreements (Detail)
3 Months Ended
Mar. 31, 2016
USD ($)
Interest Rate Swap [Member]  
Derivative [Line Items]  
Notional Amount $ 125,000,000
Effective Date Sep. 01, 2011
Expiration Date Aug. 01, 2018
Fixed Rate Paid 2.37%
Interest Rate Swap [Member] | London Interbank Offered Rate (LIBOR) [Member]  
Derivative [Line Items]  
Floating Rate Received 1 month LIBOR
Interest Rate Swap One [Member]  
Derivative [Line Items]  
Notional Amount $ 100,000,000
Effective Date Dec. 30, 2011
Expiration Date Dec. 29, 2017
Fixed Rate Paid 1.6125%
Interest Rate Swap One [Member] | London Interbank Offered Rate (LIBOR) [Member]  
Derivative [Line Items]  
Floating Rate Received 1 month LIBOR
Interest Rate Swap Two [Member]  
Derivative [Line Items]  
Notional Amount $ 100,000,000
Effective Date Sep. 04, 2013
Expiration Date Sep. 04, 2018
Fixed Rate Paid 1.371%
Interest Rate Swap Two [Member] | London Interbank Offered Rate (LIBOR) [Member]  
Derivative [Line Items]  
Floating Rate Received 1 month LIBOR
Interest Rate Swap Three [Member]  
Derivative [Line Items]  
Notional Amount $ 100,000,000
Effective Date Dec. 29, 2017
Expiration Date Nov. 29, 2019
Fixed Rate Paid 3.968%
Interest Rate Swap Three [Member] | London Interbank Offered Rate (LIBOR) [Member]  
Derivative [Line Items]  
Floating Rate Received 1 month LIBOR
Interest Rate Swap Four [Member]  
Derivative [Line Items]  
Notional Amount $ 125,000,000
Effective Date Aug. 01, 2018
Expiration Date Jun. 01, 2020
Fixed Rate Paid 4.193%
Interest Rate Swap Four [Member] | London Interbank Offered Rate (LIBOR) [Member]  
Derivative [Line Items]  
Floating Rate Received 1 month LIBOR
Interest Rate Swap Five [Member]  
Derivative [Line Items]  
Notional Amount $ 50,000,000
Effective Date May 31, 2016
Expiration Date May 31, 2026
Fixed Rate Paid 2.156%
Interest Rate Swap Five [Member] | London Interbank Offered Rate (LIBOR) [Member]  
Derivative [Line Items]  
Floating Rate Received 3 month LIBOR
Interest Rate Swap Six [Member]  
Derivative [Line Items]  
Notional Amount $ 50,000,000
Effective Date May 31, 2016
Expiration Date May 31, 2026
Fixed Rate Paid 2.1875%
Interest Rate Swap Six [Member] | London Interbank Offered Rate (LIBOR) [Member]  
Derivative [Line Items]  
Floating Rate Received 3 month LIBOR
Interest Rate Swap Seven [Member]  
Derivative [Line Items]  
Notional Amount $ 25,000,000
Effective Date May 31, 2016
Expiration Date May 31, 2026
Fixed Rate Paid 2.033%
Interest Rate Swap Seven [Member] | London Interbank Offered Rate (LIBOR) [Member]  
Derivative [Line Items]  
Floating Rate Received 3 month LIBOR
Interest Rate Swap Eight [Member]  
Derivative [Line Items]  
Notional Amount $ 25,000,000
Effective Date May 31, 2016
Expiration Date May 31, 2026
Fixed Rate Paid 1.939%
Interest Rate Swap Eight [Member] | London Interbank Offered Rate (LIBOR) [Member]  
Derivative [Line Items]  
Floating Rate Received 3 month LIBOR