Disclosure About Fair Value of Financial Instruments - Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Unrealized gains (in AOCL)			$ 0	$ 194
Tax Increment Financing Bond [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	$ 0	$ 12,640	11,197	12,447	$ 12,447
Assigned to the buyer of the Plaza assets	0	0	(11,197)	0
Unrealized gains (in AOCL)	0	1	0	194
Ending balance	$ 0	$ 12,641	$ 0	$ 12,641	$ 11,197
Discount rate (in hundredths)					6.93%