Fair Value of Financial Assets and Financial Liabilities (Level 3 Reconciliation) (Details) (USD $)	3 Months Ended	12 Months Ended
	Sep. 30, 2012	Dec. 31, 2011
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Ending balance	$ 809,000
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Ending balance	(1,558,000)
Fair Value, Measurements, Recurring [Member] | Interest Rate Swap [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance		(227,000)
Included in earnings	0	0
Included in other comprehensive income	(362,000)	(969,000)
Purchases:	0	0
Sales:	0	0
Issuances:	0	0
Settlements	0	0
Transfers in/(out) of Level 3	0	0
Ending balance	(1,558,000)	(1,196,000)
The amount of total gains or losses for the period included in earnings attributable to the change in unrealized gains or losses relating to assets and liabilities still held as of June 30, 2012:	0	0
Fair Value, Measurements, Recurring [Member] | Available-for-sale Securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance		787,000
Included in earnings	0	0
Included in other comprehensive income	24,000	(145,000)
Purchases:	143,000	0
Sales:	0	0
Issuances:	0	0
Settlements	0	0
Transfers in/(out) of Level 3	0	0
Ending balance	809,000	642,000
The amount of total gains or losses for the period included in earnings attributable to the change in unrealized gains or losses relating to assets and liabilities still held as of September 30, 2012:	$ 0	$ 0