Related Party Transactions	12 Months Ended
Related Party Transactions	Dec. 31, 2015
Related Party Transactions
Related Party Transactions	Related Party Transactions The Company’s Chief Executive Officer, Jeffrey Housenbold, was appointed to Chegg, Inc.'s ("Chegg") Board of Directors in May 2013 and to Groupon, Inc.'s ("Groupon") Board of Directors in October 2013. During the year ended December 31, 2015, the Company conducted business with both Groupon and Chegg. The Company's business with Groupon during the year consisted primarily of offering its products as part of Groupon’s flash deals. The Company's business with Chegg primarily consisted of advertising campaigns, and commercial print services with its Enterprise segment. During the years ended December 31, 2015, 2014 and 2013, the Company paid approximately $3.5 million, $3.3 million, and $2.7 million, respectively, in commissions to Groupon related to these Flash deals. As of December 31, 2015 and 2014, the Company had a receivable balance of approximately $0.8 million and $0.5 million, respectively, with Groupon. During the years ended December 31, 2015 and 2014, the Company earned revenue of approximately $0.5 million from Chegg. The Company did not earn any revenue from Chegg in 2013. As of December 31, 2015, the Company did not have a receivable balance with Chegg. The Company had a receivable balance of approximately $0.5 million as of December 31, 2014. The Company's Board of Directors includes Michael Zeisser who was appointed to XO Group Inc.'s ("XO Group") Board of Directors in July 2013. During the year ended December 31, 2015, the Company conducted business with XO Group which consisted of various marketing campaigns. The Company paid XO Group approximately $1.8 million, $1.4 million, and $0.8 million during the years ended December 31, 2015, 2014 and 2013, respectively. The Company had a payable balance of approximately $0.2 million as of December 31, 2015 and 2014 with XO Group. Management believes that these transactions are at arms length and on similar terms as would have been obtained from unaffiliated third parties.

The entire disclosure for related party transactions. Examples of related party transactions include transactions between (a) a parent company and its subsidiary; (b) subsidiaries of a common parent; (c) and entity and its principal owners; and (d) affiliates.