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Discontinued Operations (Tables) | 12 Months Ended
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Dec. 31, 2015
Discontinued Operations and Disposal Groups [Abstract] |
Schedule of Properties Sold | The following table summarizes the properties sold during the years ended December 31, 2015, 2014 and 2013:
Location |  | Month of Disposition |  | Number of Buildings |  | Rentable Square Feet (unaudited) |  | Sales Price (in millions) (1)
2015 Dispositions |  |  |  |  |  |  |  |
15050 NE 36th Street, Redmond, WA |  | April |  | 1 |  | 122,103 |  |  | $ | 51.2 |
San Diego Properties - Tranches 1 and 2 (2) |  | April/July |  | 9 |  | 924,291 |  |  | 258.0 |
Total 2015 Dispositions |  |  |  | 10 |  | 1,046,394 |  |  | $ | 309.2 |
2014 Dispositions (3) |  |  |  |  |  |  |  |
San Diego Properties, San Diego, CA (4) |  | January |  | 12 |  | 1,049,035 |  |  | $ | 294.7 |
9785 & 9791 Towne Centre Drive, San Diego, CA |  | June |  | 2 |  | 126,000 |  |  | 29.5 |
111 Pacifica, Irvine, CA |  | September |  | 1 |  | 67,496 |  |  | 15.1 |
4040 Civic Center Drive, San Rafael, CA |  | October |  | 1 |  | 130,237 |  |  | 34.9 |
999 Town & Country Road, Orange, CA |  | December |  | 1 |  | 98,551 |  |  | 25.3 |
Total 2014 Dispositions |  |  |  | 17 |  | 1,471,319 |  |  | $ | 399.5 |
2013 Dispositions (3) |  |  |  |  |  |  |  |
26541 Agoura Road, Calabasas, CA |  | June |  | 1 |  | 90,156 |  |  | $ | 14.7 |
8101 Kaiser Boulevard, Anaheim, CA |  | October |  | 1 |  | 59,790 |  |  | 9.6 |
4910 Directors Place, San Diego CA |  | December |  | 1 |  | 50,360 |  |  | 32.6 |
Total 2013 Dispositions |  |  |  | 3 |  | 200,306 |  |  | $ | 56.9 |
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(1) | Represents gross sales price before the impact of broker commissions and closing costs.
(2) | The San Diego Properties - Tranche 1 includes the following properties: 10770 Wateridge Circle, 6200 Greenwich Drive, and 6220 Greenwich Drive. The San Diego Properties - Tranche 2 includes the following properties: 6260 Sequence Drive, 6290, Sequence Drive, 6310 Sequence Drive, 6340 Sequence Drive, 6350 Sequence Drive and 4921 Directors Place.
(3) | The Company adopted ASU 2014-08 effective January 1, 2015 (see Note 2 “Basis of Presentation and Significant Accounting Policies” for additional information). As a result, results of operations for properties disposed of subsequent of January 1, 2015 are presented in continuing operations because they did not represent strategic shifts. Properties disposed of prior to January 1, 2015 are presented in discontinued operations.
(4) | The San Diego Properties included the following: 10020 Pacific Mesa Boulevard, 6055 Lusk Avenue, 5010 and 5005 Wateridge Vista Drive, 15435 and 15445 Innovation Drive, and 15051, 15073, 15231, 15253, 15333 and 15378 Avenue of Science. These properties were held for sale as of December 31, 2013.
Schedule of Real Estate Properties [Table Text Block] | Our stabilized portfolio of operating properties was comprised of the following office properties at December 31, 2015:
| Number of Buildings |  | Rentable Square Feet (unaudited) |  | Number of Tenants |  | Percentage Occupied (unaudited)
Stabilized Office Properties | 101 |  |  | 13,032,406 |  |  | 517 |  |  | 94.8 | %
As of December 31, 2015, the following properties were excluded from our stabilized portfolio:
| Number of Properties/Projects |  | Estimated Rentable Square Feet (unaudited) (1)
Properties held for sale (2) | 4 |  | 465,812 |
Development projects in “lease-up" | 1 |  | 73,000 |
Development projects under construction | 5 |  | 1,910,000 |
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(1) | Estimated rentable square feet upon completion.
Revenue and Expense Components Comprising Income from Discontinued Operations | For the years ended December 31, 2014 and 2013, discontinued operations included the results of all properties sold in 2014 and 2013 and classified as held for sale at December 31, 2013, except for the operations deemed immaterial related to a June 2014 office property disposition. The following table summarizes the revenue and expense components that comprise income from discontinued operations for the years ended December 31, 2014 and 2013:
| 2014 |  | 2013
| (in thousands)
Revenues: |  |  |
Rental income | $ | 7,206 |  |  | $ | 31,984 |
Tenant reimbursements | 278 |  |  | 3,546 |
Other property income | 13 |  |  | 5,178 |
Total revenues | 7,497 |  |  | 40,708 |
Expenses: |  |  |
Property expenses | 2,171 |  |  | 7,207 |
Real estate taxes | 692 |  |  | 3,523 |
Depreciation and amortization | 2,061 |  |  | 12,600 |
Total expenses | 4,924 |  |  | 23,330 |
Income from discontinued operations before net gain on dispositions of discontinued operations | 2,573 |  |  | 17,378 |
Net gain on dispositions of discontinued operations | 121,922 |  |  | 12,252 |
Total income from discontinued operations | $ | 124,495 |  |  | $ | 29,630 |

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