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Income Taxes: (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Common stock dividend distribution |  |  |
Ordinary income (in dollars per share) | $ 0.74 | $ 0.85 | $ 0.57
Capital gains (in dollars per share) | $ 1.13 | $ 0.01 | $ 0.04
Unrecaptured Section 1250 gain (in dollars per share) | $ 0.36 | $ 0.04 |
Return of capital (in dollars per share) |  | $ 1.15 | $ 1.49
Dividends paid (in dollars per share) | $ 2.23 | $ 2.05 | $ 2.10
Ordinary income (as a percent) | 33.20% | 41.50% | 27.10%
Capital gains (as a percent) | 50.70% | 0.50% | 1.90%
Unrecaptured Section 1250 gain (as a percent) | 16.10% | 2.00% |
Return of capital (as a percent) |  | 56.00% | 71.00%
Dividends paid (as a percent) | 100.00% | 100.00% | 100.00%
Income tax benefit |  |  |
Current |  |  | $ (11)
Deferred | 4,159 | 6,110 | 9,213
Income tax benefit | 4,159 | 6,110 | 9,202
Reconciliation of income tax benefit (provision) of the TRSs |  |  |
Book loss for TRSs | 16,154 | 19,558 | 19,896
Tax at statutory rate on earnings from continuing operations before income taxes | 5,493 | 6,650 | 6,765
Other | (1,334) | (540) | 2,437
Income tax benefit | 4,159 | 6,110 | 9,202
Components of net deferred tax assets |  |  |
Net operating loss carryforwards | 33,781 | 29,045 |
Property, primarily differences in depreciation and amortization, the tax basis of land assets and treatment of certain other assets costs | (1,973) | (4,442) |
Other | 1,606 | 2,226 |
Net deferred tax assets | 33,414 | 26,829 |
Reconciliation of unrecognized tax benefits |  |  |
Unrecognized tax benefits at beginning of year |  |  | 2,420
Gross decreases for tax positions of current year |  |  | $ (2,420)

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