Unaudited Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Revenues
Revenues	$ 121,798	$ 117,026	$ 242,739	$ 228,046
Cost of revenues (exclusive of depreciation and amortization, shown separately below)
Cost of Goods and Services Sold	79,595	77,635	158,821	152,580
Selling, general and administrative	27,884	26,128	56,624	51,812
Depreciation	1,028	1,205	2,062	2,464
Amortization	4,137	3,537	8,020	7,162
Acquisition costs	542	893	840	1,383
Adjustment to fair value of contingent consideration	121	(597)	1,091	(439)
Income from operations	8,491	8,225	15,281	13,084
Other Income (Expense)
Net interest expense	513	657	887	1,004
Net other expense (income)	52	(51)	49	(69)
Income before income taxes	7,926	7,619	14,345	12,149
Provision for income taxes	2,077	5,210	3,567	7,030
Net income	$ 5,849	$ 2,409	$ 10,778	$ 5,119
Basic net income per share (in dollars per share)	$ 0.18	$ 0.07	$ 0.33	$ 0.15
Diluted net income per share (in dollars per share)	$ 0.17	$ 0.07	$ 0.32	$ 0.15
Shares used in computing basic net income per share (in shares)	32,772	32,942	32,762	33,161
Shares used in computing diluted net income per share (in shares)	33,889	33,747	33,894	34,080
Services
Revenues
Revenues	$ 120,912	$ 107,756	$ 241,107	$ 211,777
Cost of revenues (exclusive of depreciation and amortization, shown separately below)
Cost of Goods and Services Sold	79,595	69,908	158,821	138,888
Software and hardware
Revenues
Revenues	886	9,270	1,632	16,269
Cost of revenues (exclusive of depreciation and amortization, shown separately below)
Cost of Goods and Services Sold	$ 0	$ 7,727	$ 0	$ 13,692