Segment Information (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2012
Segment Information
Net sales	$ 337,169	$ 334,697
Gross profit	46,954	46,772
Depreciation and amortization expense	2,965	3,150
Operating profit (loss)	2,878	129
Total consolidated assets	365,510		365,735
Commercial
Segment Information
Net sales	251,368	248,707
Gross profit	37,896	36,630
Depreciation and amortization expense	1,045	1,185
Operating profit (loss)	14,767	13,570
Public Sector
Segment Information
Net sales	31,026	30,762
Gross profit	2,895	3,776
Depreciation and amortization expense	15	34
Operating profit (loss)	124	36
MacMall
Segment Information
Net sales	54,840	55,229
Gross profit	6,011	6,274
Depreciation and amortization expense	214	251
Operating profit (loss)	426	320
Corporate and Other
Segment Information
Net sales	(65)	(1)
Gross profit	152	92
Depreciation and amortization expense	1,691	1,680
Operating profit (loss)	$ (12,439)	$ (13,797)