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Debt Obligations (Narrative) (Details) (USD $)
In Millions, unless otherwise specified
6 Months Ended 12 Months Ended 6 Months Ended
Jun. 30, 2013
Mar. 11, 2013
Dec. 31, 2012
item
Dec. 31, 2012
Provident Bank [Member]
Dec. 31, 2012
TriState Capital Bank [Member]
Mar. 11, 2013
Maximum [Member]
TriState Capital Bank [Member]
Dec. 31, 2012
Maximum [Member]
TriState Capital Bank [Member]
Mar. 11, 2013
Minimum [Member]
TriState Capital Bank [Member]
Dec. 31, 2012
Minimum [Member]
TriState Capital Bank [Member]
Dec. 31, 2012
CoBank ACB Revolving Loan Facility [Member]
Jun. 30, 2013
Capital Finance Agreement [Member]
Line of Credit Facility [Line Items]                      
Number of debt facilities     3                
Interest rate on borrowing                   4.71% 8.55%
Revolving loan facilty, borrowing capacity         $ 2.5         $ 10.0  
Interest rate percent, plus LIBOR           3.50% 4.00% 2.00% 3.00% 4.50%  
Line of credit, drawdown       4.0              
Fixed interest rate percent       2.50%              
Consolidated liquidity ratio 100.00%                    
Line of credit facility, maximum           20.0   17.0      
Line of credit facility, outstanding   15.2                  
Long-term debt amount                     $ 0.1
Maturity period                     3 years