Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Current assets:
Cash	$ 63,717	$ 62,358
Trade accounts receivable, net	65,944	55,261
Deferred income taxes, net	1,026	887
Prepaid expenses & other current assets	8,945	9,340
Total current assets	139,632	127,846
Property and equipment, net	15,240	16,025
Intangible assets, net	1,265	1,016
Other assets	254	253
Total assets	156,391	145,140
Current liabilities:
Accounts payable	44,502	43,664
Accrued expenses	17,512	18,948
Other current liabilities	223	208
Total current liabilities	62,237	62,820
Deferred income taxes, net	2,416	2,050
Other long-term liabilities	1,831	1,346
Total liabilities	66,484	66,216
Commitments and contingencies (Notes 1, 2 and 4)
Stockholders' equity:
Common stock, $0.0001 par, 200,000 shares authorized, 64,858 and 64,628 shares issued and outstanding	6	6
Additional paid-in capital	85,334	84,308
Retained earnings (accumulated deficit)	4,567	(5,390)
Total stockholders' equity	89,907	78,924
Total liabilities and stockholders' equity	$ 156,391	$ 145,140