Subsequent Events	12 Months Ended
Dec. 31, 2015
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events On January 13, 2016, aggregate dividends, distributions and dividend equivalents of $33.4 million were paid to common stockholders, common unitholders and RSU holders of record on December 31, 2015. On January 13, 2016, the Company completed the sale of the land parcel located in San Diego, California that was held for sale at December 31, 2015 for a gross sales price of $4.5 million. On January 21, 2016, the Company completed the sale of the four operating properties located in San Diego, California that were held for sale at December 31, 2015 for a gross sales price of $262.3 million. In January 2016, the Executive Compensation Committee granted 328,731 RSUs to Executive Officers and other key employees under the 2006 Plan. 185,032 of these RSUs are subject to market and performance-based vesting requirements, which could cause the final vested amount of RSUs to increase or decrease. The compensation cost related to both time-based and performance-based RSUs is expected to be recognized over a period of three years.

Subsequent Events

On January 13, 2016, aggregate dividends, distributions and dividend equivalents of $33.4 million were paid to common stockholders, common unitholders and RSU holders of record on December 31, 2015.

On January 13, 2016, the Company completed the sale of the land parcel located in San Diego, California that was held for sale at December 31, 2015 for a gross sales price of $4.5 million.

On January 21, 2016, the Company completed the sale of the four operating properties located in San Diego, California that were held for sale at December 31, 2015 for a gross sales price of $262.3 million.

In January 2016, the Executive Compensation Committee granted 328,731 RSUs to Executive Officers and other key employees under the 2006 Plan. 185,032 of these RSUs are subject to market and performance-based vesting requirements, which could cause the final vested amount of RSUs to increase or decrease. The compensation cost related to both time-based and performance-based RSUs is expected to be recognized over a period of three years.