Cash Collateral Pledged

12 Months Ended

Dec. 31, 2017

Cash and Cash Equivalents [Abstract]

Cash Collateral Pledged

Cash Collateral Pledged

As of December 31, 2017 and 2016, the Company pledged cash collateral in the amount of $6.1 million and $7.8 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 as collateral, $11.8 million, as of December 31, 2017, and $5.5 million, as of December 31, 2016, due between March 2018 and March 2021, for reinsurance agreements (See Note 23).