Property and Equipment - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Property Plant And Equipment [Line Items]
Description of operating lease agreements			The term of the right of use is an initial ten years with two optional renewals of five years each.
Operating lease term of contract			10 years
Operating lease renews term			5 years
Impairment expense		$ 1,754	$ 2,775	$ 1,754
Multiband Headquarters Building
Property Plant And Equipment [Line Items]
Impairment expense			500
Internally Developed Software
Property Plant And Equipment [Line Items]
Impairment expense			2,300
Selling, General and Administrative Expenses
Property Plant And Equipment [Line Items]
Depreciation and amortization of property and equipment	$ 1,300	$ 1,500	$ 4,200	$ 4,400