Disclosure About Fair Value of Financial Instruments - Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Unrealized gains (in accumulated other comprehensive loss)	$ 0	$ 445	$ 584
Tax Increment Financing Bond [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	11,197	12,447
Principal repayment	0	(1,695)
Assigned to the buyer of the Plaza assets	(11,197)	0
Unrealized gains (in accumulated other comprehensive loss)	0	445
Ending balance	$ 0	$ 11,197	$ 12,447
Discount rate (in hundredths)		6.93%