Condensed Consolidated Balance Sheet - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 27,595	$ 30,562
Accounts receivable, net of allowance for doubtful accounts of $2,949 and $3,534, respectively	188,744	205,386
Unbilled revenue	59,961	50,016
Inventories	57,164	40,694
Prepaid expenses	21,494	18,565
Other current assets	43,005	37,865
Total current assets	397,963	383,088
Property and equipment, net	79,320	36,714
Intangibles and other assets:
Goodwill, net	170,652	199,946
Intangible assets, net	10,405	27,563
Deferred income taxes	931	691
Other non-current assets	2,512	1,636
Total intangibles and other assets	184,500	229,836
Total assets	661,783	649,638
Current liabilities:
Accounts payable	161,389	141,164
Accrued expenses	35,539	34,391
Deferred revenue	17,725	17,620
Line of Credit, Current	12,979	0
Other current liabilities	21,535	24,078
Total current liabilities	249,167	217,253
Revolving credit facility - non-current	138,447	128,398
Financing obligation - build-to-suit leases	42,900	0
Deferred income taxes	12,143	12,043
Other non-current liabilities	7,230	7,399
Total liabilities	449,887	365,093
Commitments and contingencies (See Note 12)
Stockholders' equity:
Common stock, par value $0.0001 per share, 200,000 and 200,000 shares authorized, 64,434 and 64,075 shares issued, and 51,746 and 54,055 shares outstanding, respectively	6	6
Additional paid-in capital	238,385	235,199
Treasury stock at cost, 12,688 and 10,020 shares, respectively	(81,471)	(55,873)
Accumulated other comprehensive loss	(23,180)	(19,229)
Retained earnings	78,156	124,442
Total stockholders' equity	211,896	284,545
Total liabilities and stockholders' equity	$ 661,783	$ 649,638