Annual report pursuant to Section 13 and 15(d)

Derivative Instruments (Details)

v2.4.0.8
Derivative Instruments (Details) (USD $)
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2013
Interest Rate Swap [Member]
Dec. 31, 2012
Interest Rate Swap [Member]
Dec. 20, 2012
Interest Rate Swap [Member]
Dec. 31, 2013
Other Assets [Member]
Interest Rate Swap [Member]
Dec. 31, 2012
Other Long-term Liabilities [Member]
Interest Rate Swap [Member]
Derivative [Line Items]                
Derivative, notional amount           $ 187,500,000    
Derivative, fixed interest rate           0.8525%    
Interest rate, all inclusive       2.3525%        
Change in fair value of derivative instrument 825,000 (471,000) 0 800,000 (500,000)      
Price Risk Cash Flow Hedge Unrealized Gain (Loss) to be Reclassified During Next 12 Months       1,100,000        
Derivative liability, fair value, gross liability             $ 600,000 $ 800,000