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Subsequent Events (Details)			1 Months Ended	12 Months Ended
	Feb. 23, 2016 shares	Jan. 14, 2016 USD ($)	Feb. 26, 2016 ft² floor	Dec. 31, 2015 USD ($) ft²	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)	Jan. 20, 2016 USD ($)
Subsequent Event [Line Items]
Proceeds from sale of real estate | $				$ 177,488,000	$ 18,629,000	$ 52,994,000
Customer Concentration Risk | Rentable Square Feet
Subsequent Event [Line Items]
Percent of property leased				24.80%
2013 Outperformance Program
Subsequent Event [Line Items]
Maximum share value authorized under plan | $						$ 11,000,000
Icon
Subsequent Event [Line Items]
Area of real estate property | ft²				323,000
Subsequent Event
Subsequent Event [Line Items]
Stock repurchase program authorized | $							$ 100,000,000.0
Subsequent Event | 2013 Outperformance Program | Executive Officer | Common Stock | Victor Coleman
Subsequent Event [Line Items]
Shares granted during period	41,593
Subsequent Event | 2013 Outperformance Program | Executive Officer | Common Stock | Mark Lammas
Subsequent Event [Line Items]
Shares granted during period	27,448
Subsequent Event | 2013 Outperformance Program | Executive Officer | Common Stock | Christopher Barton
Subsequent Event [Line Items]
Shares granted during period	18,299
Subsequent Event | 2013 Outperformance Program | Executive Officer | Common Stock | Alexander Vouvalides
Subsequent Event [Line Items]
Shares granted during period	13,724
Subsequent Event | 2013 Outperformance Program | Executive Officer | Common Stock | Dale Shimoda
Subsequent Event [Line Items]
Shares granted during period	10,559
Subsequent Event | 2013 Outperformance Program | Executive Officer | Restricted Stock Units (RSUs) | Victor Coleman
Subsequent Event [Line Items]
Shares granted during period	41,592
Subsequent Event | 2013 Outperformance Program | Executive Officer | Restricted Stock Units (RSUs) | Mark Lammas
Subsequent Event [Line Items]
Shares granted during period	27,448
Subsequent Event | 2013 Outperformance Program | Executive Officer | Restricted Stock Units (RSUs) | Christopher Barton
Subsequent Event [Line Items]
Shares granted during period	18,298
Subsequent Event | 2013 Outperformance Program | Executive Officer | Restricted Stock Units (RSUs) | Alexander Vouvalides
Subsequent Event [Line Items]
Shares granted during period	13,724
Subsequent Event | 2013 Outperformance Program | Executive Officer | Restricted Stock Units (RSUs) | Dale Shimoda
Subsequent Event [Line Items]
Shares granted during period	10,558
Subsequent Event | Bayhill
Subsequent Event [Line Items]
Proceeds from sale of real estate | $		$ 215,000,000
Subsequent Event | Icon | Netflix
Subsequent Event [Line Items]
Number of additional floors leased | floor			5
Additional area leased (sqft) | ft²			123,221
Subsequent Event | Icon | Netflix | Customer Concentration Risk | Rentable Square Feet
Subsequent Event [Line Items]
Percent of property leased			100.00%

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 18
-URI http://asc.fasb.org/extlink&oid=51801978&loc=d3e6351-108592

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