Annual report pursuant to Section 13 and 15(d)

Fair Value of Financial Instruments - Additional Information (Detail)

v2.4.0.8
Fair Value of Financial Instruments - Additional Information (Detail) (USD $)
3 Months Ended 12 Months Ended 0 Months Ended
Dec. 31, 2011
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Apr. 22, 2013
ITS [Member]
Dec. 31, 2013
Significant Other Observable Inputs (Level 2) [Member]
Dec. 31, 2012
Significant Other Observable Inputs (Level 2) [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]              
Carrying amount of interest rate swap agreements           $ 0 $ 100,000
Carrying value of assets 339,500,000     339,500,000      
Fair value 169,500,000     169,500,000      
Impairments and other charges $ 170,000,000 $ 0 $ 0 $ 170,000,000 $ 40,200,000