Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Assets
Cash	$ 6,111	$ 13,417
Accounts and other receivables, less allowance for doubtful accounts of $2,254 in 2019 and $2,034 in 2018	119,008	107,673
Unbilled revenue	72,376	80,764
Prepaid expenses and other current assets	21,042	19,048
Total current assets	218,537	220,902
Property, plant and equipment	25,865	24,580
Accumulated depreciation	(20,145)	(18,721)
Property, plant and equipment, net	5,720	5,859
Operating lease right-of-use assets	28,867	0
Goodwill	177,258	176,124
Intangible assets, net	18,752	20,933
Other assets	12,121	10,920
Total assets	461,255	434,738
Liabilities and Stockholders’ Equity
Accounts payable and accrued expenses	80,117	93,254
Deferred revenue	23,812	23,704
Current portion of operating lease liabilities	9,078	0
Total current liabilities	113,007	116,958
Long-term debt	119,650	116,500
Long-term portion of operating lease liabilities	23,415	0
Other noncurrent liabilities	11,419	14,711
Total liabilities	267,491	248,169
Stockholders’ equity:
Common stock, par value $0.01 per share	172	172
Additional paid-in capital	104,187	105,850
Retained earnings	119,592	116,039
Treasury stock at cost	(9,830)	(13,802)
Accumulated other comprehensive loss	(20,357)	(21,690)
Total stockholders’ equity	193,764	186,569
Total Liabilities and Stockholders' Equity	$ 461,255	$ 434,738