Unaudited Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
OPERATING ACTIVITIES
Net income	$ 4,928	$ 2,709
Adjustments to reconcile net income to net cash provided by operations:
Depreciation	1,034	1,259
Amortization	3,883	3,625
Deferred income taxes	950	1,502
Non-cash stock compensation and retirement savings plan contributions	3,763	3,589
Adjustment to fair value of contingent consideration for purchase of business	969	158
Changes in operating assets and liabilities, net of acquisitions:
Accounts receivable	6,691	16,660
Other assets	1,326	(1,441)
Accounts payable	(12,050)	(8,432)
Other liabilities	(7,354)	(6,175)
Net cash provided by operating activities	4,140	13,454
INVESTING ACTIVITIES
Purchase of property and equipment	(873)	(461)
Capitalization of internally developed software costs	(86)	(362)
Purchase of business, net of cash acquired	0	(7,144)
Net cash used in investing activities	(959)	(7,967)
FINANCING ACTIVITIES
Proceeds from line of credit	57,500	66,000
Payments on line of credit	(56,500)	(59,500)
Payment of contingent consideration for purchase of business	0	(978)
Proceeds from the sale of stock through the Employee Stock Purchase Plan	39	47
Purchases of treasury stock	(2,130)	(8,122)
Remittance of taxes withheld as part of a net share settlement of restricted stock vesting	(2,861)	(2,295)
Net cash used in financing activities	(3,952)	(4,848)
Effect of exchange rate on cash and cash equivalents	(52)	135
Change in cash and cash equivalents	(823)	774
Cash and cash equivalents at beginning of period	6,307	10,113
Cash and cash equivalents at end of period	5,484	10,887
Supplemental disclosures:
Cash paid for income taxes	678	237
Cash paid for interest	293	235
Non-cash activity:
Stock issued for purchase of business (including settlement of contingent consideration)	0	2,286
Stock surrendered by sellers in conjunction with net working capital settlement	$ 303	$ 0