Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 26,770	$ 30,562
Accounts receivable, net of allowance for doubtful accounts of $4,880 and $3,534, respectively	193,253	205,386
Unbilled revenue	46,474	50,016
Inventories	56,001	40,694
Prepaid expenses	16,982	18,565
Other current assets	34,106	37,865
Total current assets	373,586	383,088
Property and equipment, net	82,933	36,714
Intangibles and other assets:
Goodwill	152,158	199,946
Intangible assets, net	9,828	27,563
Deferred income taxes	1,195	691
Other assets	2,976	1,636
Total other assets	166,157	229,836
Total assets	622,676	649,638
Current liabilities:
Accounts payable	158,449	141,164
Line of Credit, Current	142,736	0
Other current liabilities	26,231	24,078
Deferred revenue	17,614	17,620
Accrued expenses	35,474	34,391
Total current liabilities	380,504	217,253
Revolving credit facility - noncurrent	0	128,398
Deferred income taxes	8,178	12,043
Other long-term liabilities	50,903	7,399
Total liabilities	439,585	365,093
Stockholders' equity:
Common stock, par value $0.0001 per share, 200,000 and 200,000 shares authorized, 64,495 and 64,075 shares issued, 51,807 and 54,055 shares outstanding, respectively	6	6
Additional paid-in capital	239,960	235,199
Treasury stock at cost, 12,688 and 10,020 shares, respectively	(81,471)	(55,873)
Accumulated other comprehensive loss	(24,309)	(19,229)
Retained earnings	48,905	124,442
Total stockholders' equity	183,091	284,545
Total liabilities and stockholders' equity	$ 622,676	$ 649,638