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Subsequent Events: (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	6 Months Ended			0 Months Ended	6 Months Ended			0 Months Ended					0 Months Ended
	Jun. 30, 2013 Line of Credit	May 02, 2011 Line of Credit Low end of range	May 02, 2011 Line of Credit High end of range	Dec. 08, 2011 Unsecured term loan	Jun. 30, 2013 Unsecured term loan	Dec. 08, 2011 Unsecured term loan Low end of range	Dec. 08, 2011 Unsecured term loan High end of range	Aug. 07, 2013 Subsequent event Dividend declared	Aug. 05, 2013 Subsequent event Tysons Corner Center	Aug. 06, 2013 Subsequent event Line of Credit	Aug. 06, 2013 Subsequent event Line of Credit Low end of range	Aug. 06, 2013 Subsequent event Line of Credit High end of range	Aug. 01, 2013 Subsequent event Pacific Premier Retail LP Redmond Town Center sqft
Subsequent events
Property square footage/acres													695,000
Consideration received on sale of joint venture interest													$ 127,000
Gain on sale of investments in unconsolidated entity													39,400
Face amount									850,000
Interest rate (as a percent)									4.10%
Loan proceeds									550,000
Pro rata share of loan proceeds									275,000
Interest rate basis	LIBOR				LIBOR					LIBOR
Variable interest rate spread (as a percent)	2.25%	1.75%	3.00%		2.20%	1.95%	3.20%			1.50%	1.375%	2.00%
Maximum expanded revolving line of credit	2,000,000									2,000,000
Debt issued				$ 125,000
Dividend/distribution for common stockholders and OP Unit holders (in dollars per share)								$ 0.58
Percentage of dividend/distribution payable in cash								100.00%

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Percentage of the cash component of the aggregate dividend declared (not including cash paid in lieu of fractional shares).

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The expanded maximum borrowing capacity to which the credit facility can be adjusted depending on certain conditions.

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The entity's pro rata share of the cash inflow during the period from additional borrowings in aggregate debt by a joint venture of the entity.

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Area of a real estate property.

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The percentage points added to the reference rate to compute the variable rate on the debt instrument.

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The reference rate for the variable rate of the debt instrument, such as LIBOR or the US Treasury rate and the maturity of the reference rate used, such as three months or six months LIBOR.

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The stated principal amount of the debt instrument at time of issuance, which may vary from the carrying amount because of unamortized premium or discount.

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-Publisher FASB

-Name Accounting Standards Codification

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Increase of additional borrowings on existing and new debt instruments.

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Interest rate stated in the contractual debt agreement.

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The per share amount of a dividend declared, but not paid, as of the financial reporting date.

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The cash inflow during the period from additional borrowings in aggregate debt. Includes proceeds from short-term and long-term debt.

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