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Derivative Financial Instruments (Narrative) (Details) (USD $)
0 Months Ended 0 Months Ended
Mar. 03, 2008
Loans [Member]
Interest rate swap agreements [Member]
Oct. 04, 2011
Bank Of America [Member]
Interest rate swap agreements [Member]
Oct. 04, 2011
Union Bank [Member]
Interest rate swap agreements [Member]
Aug. 09, 2013
2013 Swap [Member]
Mar. 31, 2014
2013 Swap [Member]
Feb. 14, 2014
2014 Swap [Member]
Mar. 31, 2014
2014 Swap [Member]
Aug. 09, 2013
LIBOR [Member]
2013 Swap [Member]
Mar. 31, 2014
LIBOR [Member]
2014 Swap [Member]
Derivative Financial Instruments [Line Items]                  
Term of swap agreement       3 years   3 years      
Notional amount         $ 159,000,000   $ 38,000,000    
Basis spread on variable rate               1.20% 1.40%
Swap agreement collateral         40,000,000   30,000,000    
Secured notes 18,000,000                
Fixed rate 4.25%                
Loan maximum borrowing capacity   $ 18,000,000 $ 20,000,000            
Floating rate, LIBOR plus basis points (as a percentage)   0.50% 0.40%            
Loan mature date   Mar. 01, 2013 Jan. 02, 2015