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Interest Rate Swap Agreement (Details) (USD $)	Jun. 30, 2011
Interest Rate Swap Agreement (Textual) [Abstract]
Interest rate swap, maturity outstanding	$ 45,000,000
LIBOR [Member]
Additional Interest Rate Swap Agreement (Textual) [Abstract]
Swap agreement, effective percentage	5.44%
Interest Rate Swap [Member]
Additional Interest Rate Swap Agreement (Textual) [Abstract]
Interest rate swap, accumulated other comprehensive income loss/gain	$ 1,153,000

Accumulated change, net of tax, in accumulated gains and losses from derivative instruments designated and qualifying as the effective portion of cash flow hedges. Includes an entity's share of an equity investee's Increase or Decrease in deferred hedging gains or losses.

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