Long Term Debt (Schedule of Long Term Debt Applicable Margin) (Details)	Dec. 31, 2012
Greator than or equal to 3.75
Debt Instrument [Line Items]
DebtInstrumentBasisSpreadOnVariableRate	4.00%
Greator than or equal to 3.25 but less than or equal to 3.75
Debt Instrument [Line Items]
DebtInstrumentBasisSpreadOnVariableRate	3.50%
Greator than or equal to 2.75 but less than or equal to 3.25
Debt Instrument [Line Items]
DebtInstrumentBasisSpreadOnVariableRate	3.00%
less than 2.75
Debt Instrument [Line Items]
DebtInstrumentBasisSpreadOnVariableRate	2.50%