Other Long-Term Liabilities

12 Months Ended

Dec. 31, 2016

Other Long-Term Liabilities [Abstract]

Other Long-Term Liabilities

11. Other Long-Term Liabilities

Other long-term liabilities consist primarily of the Cash Conversion Derivative (see Notes 9 and 10), accrued severance and restructuring liabilities, deferred rent (see Note 12), and a deferred compensation plan.

We have a non-qualified deferred compensation plan under which certain employees may defer a portion of their salaries and receive a Company matching contribution plus a discretionary contribution based on the Company's performance against targets. Company contributions vest equally over four years. We do not fund the plan and carry it as an unsecured obligation. Participants in the plan elect payout dates for their account balances, which can be no earlier than four years from the beginning of the plan year.

As of December 31, 2016 and 2015, other long-term liabilities included vested amounts under the non-qualified deferred compensation plan of $1.6 million and $4.4 million, respectively, net of the current portions of $5.9 million and $4.1 million, respectively. For the next five years ending December 31, 2021 we must make estimated plan payments of $5.9 million, $0.1 million, $37,000, $0.2 million, and $10,000, respectively.