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
3 Months Ended 9 Months Ended
Jun. 30, 2013
Sep. 30, 2013
Derivatives, Fair Value [Line Items]    
Receive Rate   One-month LIBOR
Variable Interest Rate   0.179%
Cash Flow Swap [Member]
   
Derivatives, Fair Value [Line Items]    
Notional Amount   $ 3.0
Pay Rate   7.10%
Receive Rate   one-month LIBOR + 1.50%
Variable Interest Rate   1.50%
Maturing Date   Jul. 10, 2017
Cash Flow Swap 1 [Member]
   
Derivatives, Fair Value [Line Items]    
Notional Amount   9.5
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   7.9
Pay Rate   6.86%
Receive Rate   one-month LIBOR + 1.25%
Variable Interest Rate   1.25%
Maturing Date   Aug. 01, 2017
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   6.7
Pay Rate   6.41%
Receive Rate   one-month LIBOR + 1.25%
Variable Interest Rate   1.25%
Maturing Date   Sep. 12, 2017
Cash Flow Swap 6 [Member]
   
Derivatives, Fair Value [Line Items]    
Notional Amount   50.0
Pay Rate   2.767%
Receive Rate   one-month LIBOR
Maturing Date   Jul. 01, 2014
Cash Flow Swap 7 [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 8 [Member]
   
Derivatives, Fair Value [Line Items]    
Notional Amount   50.0
Pay Rate   2.61%
Receive Rate   one-month LIBOR
Maturing Date   Jul. 01, 2014
Cash Flow Swap 9 [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 10 [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 11 [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 12 [Member]
   
Derivatives, Fair Value [Line Items]    
Notional Amount 200.0 200.0
Pay Rate   0.788%
Receive Rate   one-month LIBOR
Maturing Date Jul. 01, 2016 Jul. 01, 2016
Cash Flow Swap 13 [Member]
   
Derivatives, Fair Value [Line Items]    
Notional Amount 50.0 50.0
Pay Rate   1.32%
Receive Rate   one-month LIBOR
Maturing Date Jul. 01, 2017 Jul. 01, 2017
Cash Flow Swap 14 [Member]
   
Derivatives, Fair Value [Line Items]    
Notional Amount $ 250.0 $ 250.0
Pay Rate   1.887%
Receive Rate   one-month LIBOR
Maturing Date Jun. 30, 2018 Jun. 30, 2018