Fair Value Measurement and Fair Value of Financial Instruments (Narrative) (Details) (USD $)	3 Months Ended	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2012	Dec. 31, 2011
Fair Value Measurements and Fair Value of Financial Instruments [Abstract]
Interruptions of scheduled principal payments	$ 112,000	$ 170,000
Impaired Financing Receivable, with Related Allowance, Recorded Investment	8,226,000	8,226,000	11,825,000
Impaired Financing Receivable, Related Allowance	871,000	871,000	1,085,000
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	$ 2,093,000	$ 2,093,000	$ 2,121,000