Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Assets
Cash	$ 8,427	$ 13,417
Accounts and other receivables, less allowance for doubtful accounts of $2,073 in 2019 and $2,034 in 2018	101,170	107,673
Unbilled revenue	83,350	80,764
Prepaid expenses and other current assets	25,454	19,048
Total current assets	218,401	220,902
Property, plant and equipment	25,444	24,580
Accumulated depreciation	(19,613)	(18,721)
Property, plant and equipment, net	5,831	5,859
Operating lease right-of-use assets	29,273
Goodwill	177,288	176,124
Intangible assets, net	19,888	20,933
Other assets	10,784	10,920
Total assets	461,465	434,738
Liabilities and Stockholders’ Equity
Accounts payable and accrued expenses	92,156	93,254
Deferred revenue	18,100	23,704
Current portion of operating lease liabilities	9,402
Total current liabilities	119,658	116,958
Long-term debt	116,607	116,500
Long-term portion of operating lease liabilities	23,653
Other noncurrent liabilities	11,833	14,711
Total liabilities	271,751	248,169
Stockholders’ equity:
Common stock, par value $0.01 per share	172	172
Additional paid-in capital	104,909	105,850
Retained earnings	116,373	116,039
Treasury stock at cost	(11,763)	(13,802)
Accumulated other comprehensive loss	(19,977)	(21,690)
Total stockholders’ equity	189,714	186,569
Total Liabilities and Stockholders' Equity	$ 461,465	$ 434,738