Disclosure About Fair Value of Financial Instruments - Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation (Details) (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Unrealized gains (in AOCL)	$ 165,000	$ 390,000
Contingent Consideration to Acquire Real Estate Assets [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	0	563,000
Recognized gains (in general and administrative)	0	(188,000)
Ending balance	0	375,000
Tax Increment Financing Bond [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	13,403,000	14,496,000
Principal repayment	0	(562,000)
Unrealized gains (in AOCL)	165,000	390,000
Ending balance	13,568,000	14,324,000
Maturity date	Dec. 20, 2020
Amount by which outstanding principal amount exceeds estimated fair value	900,000
Change in discount rate (in hundredths)	1.00%
Fair value of Level 3 asset	13,568,000	14,324,000
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
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