Annual report pursuant to Section 13 and 15(d)

Derivative Financial Instruments - Narrative (Details)

v2.4.0.8
Derivative Financial Instruments - Narrative (Details) (Cash Flow Hedging [Member], Designated as Hedging Instrument [Member], USD $)
12 Months Ended 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2005
Treasury Lock [Member]
derivative_agreement
Derivative [Line Items]      
Number of derivative agreements     2
Debt instrument, term     10 years
Proceeds from hedge     $ 3,200,000
Unamortized balance of settled derivative agreements 700,000 1,100,000  
Gain (loss) reclassification from accumulated other comprehensive income to earnings, estimated net amount to be transferred $ 395,000