Income Taxes (Narrative) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Related Party Transaction [Line Items]
Period that Company cannot be qualified as REIT once fails qualification test	4 years
Net unrealized gains on assets recognization period	10 years
Income tax assets excluding those from TRS	$ 169,602	$ 213,219
Income tax liabilities excluding those from TRS	79,308	116,225
Net operating loss carryforward for federal income tax purposes	7,599	6,289	5,524
Combined federal and state rate used to estimate income tax expense (benefit)	38.00%
Deferred tax asset	151	186	5,850
net deferred tax assets	7,770	6,523	5,850
Valuation Allowance	7,619	6,337	0
TRS Lessee [Member]
Related Party Transaction [Line Items]
Net operating loss carryforward for federal income tax purposes	20,000
Deferred tax asset	7,800	6,500	5,900
Valuation Allowance	$ 7,600	$ 6,300