Carrying amount of reserve for known or estimated probable loss from litigation, which may include attorneys' fees and other litigation costs, which is expected to be paid within one year of the date of the statement of financial position.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.25)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14326-108349

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 55
-Paragraph 11
-URI http://asc.fasb.org/extlink&oid=6396582&loc=d3e15243-108350

Name:	us-gaap_LitigationReserveCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Commitments and Contingencies Commitments and Contingencies (Details) - USD ($)		3 Months Ended
	Apr. 19, 2016	Dec. 31, 2016	Mar. 31, 2017	Mar. 31, 2016
Legal settlement accrual		$ 2,601,000	$ 145,000
Moore v. Angie's List [Member]
Litigation Settlement, Amount	$ 2,350,000
Litigation Settlement, Optional Free Membership Period	4 months
Legal settlement accrual		2,601,000	$ 145,000	$ 3,500,000
Moore v. Angie's List [Member] \| Scenario, Adjustment [Member]
Loss Contingency Accrual, Period Increase (Decrease)		$ (671,000)