Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Statement of Cash Flows [Abstract]
Interest Paid, Excluding Capitalized Interest, Operating Activities	$ 4,681	$ 1,388
Cash flows from operating activities:
Net income	5,694	9,451
Adjustments to reconcile net income to net cash provided by operating activities:
Gain on change in fair value of contingent consideration, net	(677)	(3,972)
Depreciation and amortization	6,992	5,670
Deferred income taxes	(258)	(610)
Non-cash compensation expense	3,939	3,501
Changes in other operating items:
Accounts and other receivables	(10,997)	(4,644)
Unbilled revenue	19,296	6,344
Prepaid expenses and other current assets	(6,628)	(5,131)
Accounts payable, accrued expenses and net change in operating leases	(12,188)	(5,527)
Deferred revenue	(1,840)	(2,215)
Other	1,218	643
Net cash provided by operating activities	4,551	3,510
Cash flows from investing activities:
Additions to property, plant and equipment	(1,905)	(2,267)
Acquisitions, net of cash acquired	850	(42,872)
Capitalized software development costs and other	(2,261)	(3,229)
Net cash used in investing activities	(3,316)	(48,368)
Cash flows from financing activities:
Proceeds from short-term borrowings	0	31,410
Proceeds from long-term debt	120,350	18,000
Repayment of long-term debt	(123,700)	(9,000)
Change in negative cash book balance	(1,329)	723
Repurchases of common stock in the open market	0	(8,485)
Other financing activities	(421)	(127)
Net cash (used in) provided by financing activities	(5,100)	32,521
Effect of exchange rate changes on cash and cash equivalents	(1,813)	(952)
Net decrease in cash	(5,678)	(13,289)
Cash at beginning of period	13,417	23,612
Cash at end of period	7,739	10,323
Supplemental disclosures of cash flow information:
Cash paid during the period for income taxes	$ 2,148	$ 3,371