Condensed Consolidated Statements of Comprehensive Income (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Revenues:
Services revenue	$ 106,270	$ 117,181	$ 285,314	$ 282,519
Product revenue, net	35,299	0	72,438	0
Total revenues	141,569	117,181	357,752	282,519
Cost of revenues:
Cost of revenues:	56,233	69,352	127,526	146,339
Product cost of revenue	23,137	0	48,166	0
Total cost of revenues	79,370	69,352	175,692	146,339
Engineering and technology	4,817	2,508	8,952	5,046
Sales and marketing	22,287	14,695	78,123	53,179
General and administrative	10,425	6,557	19,057	12,941
Depreciation	1,135	524	2,193	1,041
Amortization of intangible assets	5,761	3,168	11,345	6,337
Total operating expenses	123,795	96,804	295,362	224,883
Operating income	17,774	20,377	62,390	57,636
Other loss, net	(3,724)	(6,304)	(7,793)	(7,309)
Income before income taxes	14,050	14,073	54,597	50,327
Income tax expense	(5,313)	(5,667)	(19,873)	(18,313)
Net income	8,737	8,406	34,724	32,014
Net income per share:
Basic, USD per share	$ 0.21	$ 0.20	$ 0.83	$ 0.78
Diluted, USD per share	$ 0.20	$ 0.20	$ 0.79	$ 0.75
Weighted average shares outstanding:
Basic, USD per share	41,570	41,050	41,866	40,981
Diluted, USD per share	43,084	42,724	43,803	42,657
Other comprehensive income:
Net income	8,737	8,406	34,724	32,014
Unrealized gain (loss) on available-for-sale investments, net of tax	2,076	(8)	2,090	36
Unrealized gain on derivative instrument, net of tax	0	169	0	209
Reclassification adjustment for realized gain on available-for-sale investments, net of tax, included in net income	0	(1)	0	(1)
Other comprehensive income	2,076	160	2,090	244
Comprehensive income	$ 10,813	$ 8,566	$ 36,814	$ 32,258