Subsequent Events - Narrative (Details) (USD $) In Millions, unless otherwise specified	0 Months Ended		0 Months Ended
Apr. 23, 2014 Tierrasanta	Apr. 23, 2014 Tierrasanta sqft	Jul. 31, 2014 Subsequent Event Location 901 Market Street sqft
Subsequent Event
Proceeds from sale of real estate	$ 19.5
Area of real estate property		112,300
Term of operating lease			15 years
New lease contract, area of real estate leased			40,558

Cash received for the sale of real estate that is not part of an investing activity during the current period.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 12

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3179-108585

Name:	us-gaap_ProceedsFromSaleOfRealEstate
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration