Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Current assets:
Cash	$ 90,929	$ 62,358
Trade accounts receivable, net (Note 1)	61,045	55,261
Deferred income taxes, net	950	887
Prepaid expenses & other current assets	12,217	9,340
Total current assets	165,141	127,846
Property and equipment, net	14,182	16,025
Intangible assets, net	1,650	1,016
Other assets	259	253
Total assets	181,232	145,140
Current liabilities:
Accounts payable	45,847	43,664
Accrued expenses	22,498	18,948
Other current liabilities	327	208
Total current liabilities	68,672	62,820
Deferred income taxes, net	2,307	2,050
Other long-term liabilities	2,208	1,346
Total liabilities	73,187	66,216
Commitments and contingencies (Notes 1, 2 and 5)
Stockholders' equity:
Common stock, $0.0001 par, 200,000 shares authorized, 64,989 and 64,628 shares issued and outstanding	6	6
Additional paid-in capital	87,572	84,308
Retained earnings (accumulated deficit)	20,467	(5,390)
Total stockholders' equity	108,045	78,924
Total liabilities and stockholders' equity	$ 181,232	$ 145,140