Disclosure About Fair Value of Financial Instruments - Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Unrealized gains (in AOCL)			$ 293,000	$ 396,000
Contingent Consideration to Acquire Real Estate Assets [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	0	384,000	0	563,000
Unrecognized gains (in general and administrative)	0	(193,000)	0	(372,000)
Ending balance	0	191,000	0	191,000
Tax Increment Financing Bond [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	13,673,000	14,233,000	13,403,000	14,496,000
Principal repayment	0	0	0	(562,000)
Unrealized gains (in AOCL)	23,000	97,000	293,000	396,000
Ending balance	13,696,000	14,330,000	13,696,000	14,330,000
Maturity date			Dec. 20, 2020
Amount by which outstanding principal amount exceeds estimated fair value			700,000
Change in discount rate (in hundredths)	1.00%
Discount rate (in hundredths)			9.70%
Tax Increment Financing Bond [Member] | Minimum [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Change in fair value of bond if discount rate changes	400,000		400,000
Tax Increment Financing Bond [Member] | Maximum [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Change in fair value of bond if discount rate changes	$ 400,000		$ 400,000