Condensed Consolidated Statements of Operations (Unaudited) (USD $) Share data in Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Condensed Consolidated Statements of Operations [Abstract]
Revenue	$ 119,189,000	$ 113,245,000	$ 231,285,000	$ 212,897,000
Operating expenses:
Cost of revenue (exclusive of depreciation and amortization included below)	80,573,000	78,808,000	158,746,000	150,544,000
Sales and marketing	8,630,000	8,701,000	17,139,000	16,979,000
General and administrative	19,504,000	18,657,000	38,680,000	37,282,000
Research and development	1,386,000	1,518,000	2,748,000	2,914,000
Depreciation and amortization	1,688,000	1,435,000	3,333,000	2,726,000
Amortization of acquisition-related intangible assets	545,000	583,000	1,025,000	1,166,000
Restructuring, impairment and other charges	6,719,000	643,000	7,003,000	2,746,000
Total operating expenses	119,045,000	110,345,000	228,674,000	214,357,000
Income (loss) from operations	144,000	2,900,000	2,611,000	(1,460,000)
Interest expense:
Interest on outstanding debt	182,000	185,000	372,000	334,000
Amortization of deferred financing charges	25,000	25,000	50,000	50,000
Interest income	18,000	15,000	38,000	32,000
Other expense, net	671,000	423,000	640,000	881,000
Income (loss) before income taxes	(716,000)	2,282,000	1,587,000	(2,693,000)
(Benefits from) Provisions for income taxes	(3,186,000)	560,000	(2,604,000)	1,031,000
Net income (loss)	$ 2,470,000	$ 1,722,000	$ 4,191,000	$ (3,724,000)
Net income (loss), per share of common stock:
Basic	$ 0.04	$ 0.03	$ 0.07	$ (0.06)
Diluted	$ 0.04	$ 0.03	$ 0.07	$ (0.06)
Weighted average number of common shares outstanding:
Basic	58,880	57,815	58,723	57,671
Diluted	60,390	59,548	59,894	57,671