XML 24 R11.htm IDEA: XBRL DOCUMENT

Cash Collateral Pledged	12 Months Ended
Cash Collateral Pledged	Dec. 31, 2018
Cash and Cash Equivalents [Abstract]
Cash Collateral Pledged	Cash Collateral Pledged As of December 31, 2018 and 2017, the Company pledged cash collateral in the amount of $5.3 million and $6.1 million, respectively, which relates to letters of credit issued to the landlords of the Company's premises in New York City, Boston, Stamford and San Francisco. The Company also has pledged collateral for reinsurance agreements which amounted to $1.0 million, as of December 31, 2018, and $11.8 million, as of December 31, 2017, which is anticipated to be due March 2021. (see Note 23).