Quarterly report pursuant to Section 13 or 15(d)

Long-Term Debt - Summary of Interest Received and Paid under Term of Cash Flow Swap (Detail)

v2.4.0.8
Long-Term Debt - Summary of Interest Received and Paid under Term of Cash Flow Swap (Detail) (USD $)
In Millions, unless otherwise specified
 9 Months Ended
Sep. 30, 2014
Derivatives, Fair Value [Line Items]  
Receive Rate One-month LIBOR
Variable Interest Rate 0.153%
Cash Flow Swap [Member]
  
Derivatives, Fair Value [Line Items]  
Notional Amount $ 2.8
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 8.8
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 7.5
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 100.0
Pay Rate 3.28%
Receive Rate one-month LIBOR
Maturing Date Jul. 01, 2015
Cash Flow Swap 4 [Member]
  
Derivatives, Fair Value [Line Items]  
Notional Amount 100.0
Pay Rate 3.30%
Receive Rate one-month LIBOR
Maturing Date Jul. 01, 2015
Cash Flow Swap 5 [Member]
  
Derivatives, Fair Value [Line Items]  
Notional Amount 6.4
Pay Rate 6.41%
Receive Rate one-month LIBOR + 1.25%
Maturing Date Sep. 12, 2017
Variable Interest Rate 1.25%
Cash Flow Swap 6 [Member]
  
Derivatives, Fair Value [Line Items]  
Notional Amount 50.0
Pay Rate 3.24%
Receive Rate one-month LIBOR
Maturing Date Jul. 01, 2015
Cash Flow Swap 7 [Member]
  
Derivatives, Fair Value [Line Items]  
Notional Amount 50.0
Pay Rate 3.07%
Receive Rate one-month LIBOR
Maturing Date Jul. 01, 2015
Cash Flow Swap 8 [Member]
  
Derivatives, Fair Value [Line Items]  
Notional Amount 100.0
Pay Rate 2.065%
Receive Rate one-month LIBOR
Maturing Date Jun. 30, 2017
Cash Flow Swap 9 [Member]
  
Derivatives, Fair Value [Line Items]  
Notional Amount 100.0
Pay Rate 2.015%
Receive Rate one-month LIBOR
Maturing Date Jun. 30, 2017
Cash Flow Swap 10 [Member]
  
Derivatives, Fair Value [Line Items]  
Notional Amount 200.0
Pay Rate 0.788%
Receive Rate one-month LIBOR
Maturing Date Jul. 01, 2016
Cash Flow Swap 11 [Member]
  
Derivatives, Fair Value [Line Items]  
Notional Amount 50.0
Pay Rate 1.32%
Receive Rate one-month LIBOR
Maturing Date Jul. 01, 2017
Cash Flow Swap 12 [Member]
  
Derivatives, Fair Value [Line Items]  
Notional Amount 250.0
Pay Rate 1.887%
Receive Rate one-month LIBOR
Maturing Date Jun. 30, 2018
Cash Flow Swap 13 [Member]
  
Derivatives, Fair Value [Line Items]  
Notional Amount 25.0
Pay Rate 2.08%
Receive Rate one-month LIBOR
Maturing Date Jul. 01, 2017
Cash Flow Swap 14 [Member]
  
Derivatives, Fair Value [Line Items]  
Notional Amount $ 100.0
Pay Rate 1.56%
Receive Rate one-month LIBOR
Maturing Date Jul. 01, 2017