Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Current assets:
Cash and cash equivalents	$ 30,755	$ 22,578
Accounts receivable, net of allowance for doubtful accounts of $1,231 and $2,685, respectively	188,819	179,466
Unbilled revenue	30,758	31,699
Inventories	33,327	27,163
Prepaid expenses	14,353	12,684
Deferred income taxes	0	1,819
Other current assets	31,825	28,819
Total current assets	329,837	304,228
Property and equipment, net	32,681	29,764
Intangibles and other assets:
Goodwill	206,257	246,948
Intangible assets, net	37,715	44,920
Deferred income taxes	586	3,904
Other non-current assets	1,391	1,487
Total other assets	245,949	297,259
Total assets	608,467	631,251
Current liabilities:
Accounts payable	170,244	144,045
Current portion of contingent consideration	11,387	9,078
Due to seller	402	402
Other current liabilities	31,363	30,637
Accrued expenses	11,603	9,990
Total current liabilities	224,999	194,152
Revolving credit facility	99,258	104,539
Deferred income taxes	12,898	9,967
Contingent consideration, net of current portion	10,775	23,504
Other long-term liabilities	2,510	2,942
Total liabilities	$ 350,440	$ 335,104
Commitments and Contingencies
Stockholders' equity:
Common stock, par value $0.0001 per share, 200,000 and 200,000 shares authorized, 62,645 and 61,852 shares issued, 51,282 and 52,830 shares outstanding, respectively	$ 6	$ 6
Additional paid-in capital	213,566	207,429
Treasury stock at cost, 9,547 and 9,021 shares, respectively	(52,207)	(49,996)
Accumulated other comprehensive loss	(13,993)	(5,401)
Retained earnings	110,655	144,109
Total stockholders' equity	258,027	296,147
Total liabilities and stockholders' equity	$ 608,467	$ 631,251