Segment Information (Detail) (USD $)	1 Months Ended	12 Months Ended
	Mar. 31, 2012	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Segment Reporting Information
Revenue		$ 152,550,000		$ 132,794,000		$ 138,726,000
Operating expenses		153,575,000		140,496,000		142,423,000
Gain on sales of intangible assets		3,774,000		6,296,000		9,421,000
Income (loss) from operations		2,749,000		(17,243,000)		5,724,000
Less reconciling items:
Stock based compensation		9,264,000		15,696,000		15,143,000
Impairment of goodwill				15,837,000
Amortization of intangible assets from acquisitions		2,926,000	[1]	4,728,000	[1]	5,455,000	[1]
Acquisition and separation related costs	132,000	878,000		753,000		1,890,000
Income (loss) before provision for income taxes		2,712,000		(17,692,000)		5,266,000
Archeo
Less reconciling items:
Impairment of goodwill				15,800,000
Operating Segments
Segment Reporting Information
Revenue		152,550,000		132,794,000		138,726,000
Operating expenses		140,534,000		119,377,000		120,010,000
Gain on sales of intangible assets		3,774,000		6,296,000		9,421,000
Income (loss) from operations		15,790,000		19,713,000		28,137,000
Less reconciling items:
Stock based compensation		9,237,000		15,638,000		15,068,000
Impairment of goodwill				15,837,000
Amortization of intangible assets from acquisitions		2,926,000		4,728,000		5,455,000
Acquisition and separation related costs		878,000		753,000		1,890,000
Interest expense and other, net		37,000		449,000		458,000
Income (loss) before provision for income taxes		2,712,000		(17,692,000)		5,266,000
Operating Segments | Call driven
Segment Reporting Information
Revenue		135,126,000		111,886,000		101,830,000
Operating expenses		128,829,000		106,795,000		97,270,000
Income (loss) from operations		6,297,000		5,091,000		4,560,000
Operating Segments | Archeo
Segment Reporting Information
Revenue		17,424,000		20,908,000		36,896,000
Operating expenses		11,705,000		12,582,000		22,740,000
Gain on sales of intangible assets		3,774,000		6,296,000		9,421,000
Income (loss) from operations		$ 9,493,000		$ 14,622,000		$ 23,577,000

[1] Components of amortization of intangible assets from acquisitions