Annual report pursuant to Section 13 and 15(d)

Financial Instruments - Notional Amounts of Derivative Instruments (Details)

v2.4.0.8
Financial Instruments - Notional Amounts of Derivative Instruments (Details) (Interest Rate Contract [Member], USD $)
 12 Months Ended 12 Months Ended
Dec. 31, 2013
Other Current Liabilities [Member]
Not Designated as Hedging Instrument [Member]
Dec. 31, 2012
Other Current Liabilities [Member]
Not Designated as Hedging Instrument [Member]
Dec. 31, 2013
Effective Date August 14, 2012 [Domain]
Dec. 31, 2013
Effective Date August 14, 2012 [Domain]
Maximum [Member]
Dec. 31, 2013
Effective Date June 5, 2013 [Domain]
Dec. 31, 2013
Effective Date June 5, 2013 [Domain]
Maximum [Member]
Derivative [Line Items]            
Interest Rate Derivative Liabilities, at Fair Value $ 13,484,000 $ 0        
Notional amount of interest rate derivative     $ 0 $ 0 $ 0 $ 0
Derivative, Inception Date     Aug. 14, 2012   Jun. 05, 2013  
Derivative, Maturity Date     Jul. 31, 2019   May 28, 2020  
Weighted average fixed inteerst rate paid on derivative     1.98%   2.05%  
Debt Instrument, Description of Variable Rate Basis     One-month LIBOR   One-month LIBOR