Employee Benefit Plans	12 Months Ended
Dec. 31, 2014
Compensation and Retirement Disclosure [Abstract]
Employee Benefit Plans	Employee Benefit Plans Spōk Holdings, Inc. Savings and Retirement Plan — The Spōk Holdings,, Inc. Savings and Retirement Plan (the “Plan”), is open to all Company employees working a minimum of twenty hours per week with at least 30 days of service. The Plan qualifies under Section 401(k) of the IRC. Under the Plan, participating employees may elect to voluntarily contribute a percentage of their qualifying compensation on a pretax or after-tax basis up to the annual maximum amounts established by the IRC. The Company matches 50% of the employee’s contribution, up to 5% of each participant’s gross salary per pay period, or 50% of the employee’s annualized contribution up to $2,500, whichever is greater. There is a per-pay-period match on the 5% component and an end-of-year true up on the $2,500 component. Contributions made by the Company become fully vested three years from the date of the participant’s employment (33% in year one, 66% in year two and 100% in year three). For purposes of vesting, a year consists of 1000 hours or more. Other than the Company match as discussed above, profit sharing contributions are discretionary. Effective January 1, 2012, the Amcom Software, Inc. 401(k) Plan was merged into the Plan, and all qualified Amcom employees were eligible to participate in the Plan as noted above. Matching contributions under the Plan were approximately $1.1 million for the years ended December 31, 2014, 2013 and 2012. Spōk Holdings, Inc. Severance Pay Plan — The Spōk Holdings, Inc. Severance Pay Plan for salaried employees, hourly employees and commissioned direct-sales employees (the “Severance Plan”) provides severance payments on a discretionary basis to certain employees who are terminated involuntarily under certain specified circumstances as defined in the Severance Plan. The amount of the benefit to be provided is based on the employee’s compensation and years of service with the Company as defined. Eligible terminated employees will receive two weeks of compensation for each completed year of service, up to a maximum of twenty-six weeks of compensation with a minimum compensation of two weeks. We maintain a substantially similar type of severance pay plan for executive employees at and above the level of vice-president. At December 31, 2014, 2013 and 2012, the accrued severance and restructuring liability included $1.6 million, $1.5 million and $2.6 million, respectively, associated with these plans, reflecting our expected headcount reductions (see Note 13).

Employee Benefit Plans

Spōk Holdings, Inc. Savings and Retirement Plan — The Spōk Holdings,, Inc. Savings and Retirement Plan (the “Plan”), is open to all Company employees working a minimum of twenty hours per week with at least 30 days of service. The Plan qualifies under Section 401(k) of the IRC. Under the Plan, participating employees may elect to voluntarily contribute a percentage of their qualifying compensation on a pretax or after-tax basis up to the annual maximum amounts established by the IRC. The Company matches 50% of the employee’s contribution, up to 5% of each participant’s gross salary per pay period, or 50% of the employee’s annualized contribution up to $2,500, whichever is greater. There is a per-pay-period match on the 5% component and an end-of-year true up on the $2,500 component. Contributions made by the Company become fully vested three years from the date of the participant’s employment (33% in year one, 66% in year two and 100% in year three). For purposes of vesting, a year consists of 1000 hours or more. Other than the Company match as discussed above, profit sharing contributions are discretionary. Effective January 1, 2012, the Amcom Software, Inc. 401(k) Plan was merged into the Plan, and all qualified Amcom employees were eligible to participate in the Plan as noted above. Matching contributions under the Plan were approximately $1.1 million for the years ended December 31, 2014, 2013 and 2012.

Spōk Holdings, Inc. Severance Pay Plan — The Spōk Holdings, Inc. Severance Pay Plan for salaried employees, hourly employees and commissioned direct-sales employees (the “Severance Plan”) provides severance payments on a discretionary basis to certain employees who are terminated involuntarily under certain specified circumstances as defined in the Severance Plan. The amount of the benefit to be provided is based on the employee’s compensation and years of service with the Company as defined. Eligible terminated employees will receive two weeks of compensation for each completed year of service, up to a maximum of twenty-six weeks of compensation with a minimum compensation of two weeks. We maintain a substantially similar type of severance pay plan for executive employees at and above the level of vice-president. At December 31, 2014, 2013 and 2012, the accrued severance and restructuring liability included $1.6 million, $1.5 million and $2.6 million, respectively, associated with these plans, reflecting our expected headcount reductions (see Note 13).