Income Taxes (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Current:
State	$ 542	$ 520	$ 735
Foreign	465	102
Current tax	1,007	622	735
Deferred:
Foreign	340	(72)
Deferred tax	340	(72)
Income tax provision	1,347	550	735
Reconciliation of effective tax rate and the U.S. Federal statutory income tax rate
Taxes at statutory U.S. federal income tax rate (as a percent)	35.00%	35.00%	35.00%
Dividends paid deduction (as a percent)	(35.00%)	(35.00%)	(35.00%)
State, local, and foreign income taxes, net of federal tax benefit (as a percent)	1.22%	0.40%	0.40%
Effective tax rate (as a percent)	1.22%	0.40%	0.40%
Net deferred tax assets	1,992	1,270
Deferred tax assets related to properties located in Australia	1,414	1,178
Deferred tax liabilities	1,214	20
Valuation allowance	$ 165	$ 160