Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Cash Flows From Operating Activities
Net income (loss)	$ 17,593	$ (18,258)	$ 5,465
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Depreciation and amortization	15,784	12,217	11,893
Write-off of software work in process	37	25,427
Provision for deferred income taxes	1,248	(9,775)	2,987
Excess tax benefit related to stock option exercises	(895)	(231)	(293)
Non-cash stock-based compensation	1,961	1,589	1,502
Change in operating assets and liabilities:
Accounts receivable	(17,421)	(126,981)	(3,545)
Inventories	(25,557)	1,663	66,267
Prepaid expenses and other current assets	1,770	(629)	(1,334)
Other assets	1,020	837	855
Accounts payable	87,702	54,314	(8,576)
Accrued expenses and other current liabilities	12,948	6,317	(2,593)
Deferred revenue	(572)	1,074	636
Total adjustments	78,025	(34,178)	67,799
Net cash provided by (used in) operating activities	95,618	(52,436)	73,264
Cash Flows From Investing Activities
Acquisition of assets of En Pointe		(17,295)
Acquisition of Acrodex, net of cash acquired	(93)	(13,566)
Acquisition of assets of Systemax	(400)	(14,000)
Acquisition of Stratiform	(1,584)
Purchases of property and equipment	(8,705)	(21,380)	(26,666)
Net cash used in investing activities	(10,782)	(66,241)	(26,666)
Cash Flows From Financing Activities
Net borrowings (payments) under line of credit	(55,043)	109,644	(57,704)
Borrowings under notes payable	526	17,695	13,734
Payments under notes payable	(5,173)	(4,686)	(2,487)
Change in book overdraft	(13,131)	16,387	(98)
Payments of earn-out liability	(13,058)	(8,938)
Payments of obligations under capital leases	(2,425)	(2,394)	(2,625)
Proceeds from stock issued under stock option plans	2,541	907	3,887
Payments for deferred financing costs	(653)	(760)	(30)
Common shares repurchased and held in treasury	(3,608)	(5,854)	(2,151)
Excess tax benefit related to stock option exercises	895	231	293
Capital lease proceeds
Net cash provided by (used in) financing activities	(89,129)	122,232	(47,181)
Effect of foreign currency on cash flow	289	(1,271)	(517)
Net change in cash and cash equivalents	(4,004)	2,284	(1,100)
Cash and cash equivalents at beginning of the period	11,176	8,892	9,992
Cash and cash equivalents at end of the period	7,172	11,176	8,892
Supplemental Cash Flow Information
Interest paid	5,373	3,619	3,353
Income taxes paid (refund), net	7,332	(4,960)	6,184
Supplemental Non-Cash Investing and Financing Activities
Accrued earn-out liability related to En Pointe acquisition		38,625
Accrued earn-out liability related to Stratiform acquisition	326
Financed purchase of property and equipment	$ 777	$ 895	$ 2,332