Segment Information (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013
Segment Information
Net sales	$ 339,624	$ 355,497	$ 670,346	$ 678,107
Gross profit	48,639	50,034	98,157	95,402
Depreciation and amortization expense	2,721	2,748	5,304	5,528
Operating profit	3,881	6,655	9,989	9,830
Total consolidated assets	367,376		367,376		434,822
Commercial
Segment Information
Net sales	256,385	257,374	508,506	508,741
Gross profit	39,804	40,375	81,338	78,271
Depreciation and amortization expense	603	1,015	1,215	2,060
Operating profit	14,215	16,989	31,873	31,756
Public Sector
Segment Information
Net sales	50,883	61,190	87,303	92,216
Gross profit	5,262	5,313	8,804	8,208
Depreciation and amortization expense	13	14	26	29
Operating profit	2,046	1,757	2,620	1,881
MacMall
Segment Information
Net sales	32,363	36,934	74,547	77,216
Gross profit	3,581	4,513	8,026	8,938
Depreciation and amortization expense	67	30	99	59
Operating profit	274	1,032	1,076	1,755
Corporate and Other
Segment Information
Net sales	(7)	(1)	(10)	(66)
Gross profit	(8)	(167)	(11)	(15)
Depreciation and amortization expense	2,038	1,689	3,964	3,380
Operating profit	$ (12,654)	$ (13,123)	$ (25,580)	$ (25,562)