Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 2012

Fair Value Disclosures [Abstract]

Assets Measured at Fair Value on a Recurring Basis

These tables present the carrying value and fair value, by fair value hierarchy, of our financial instruments, excluding cash and cash equivalents at December 31, 2011 and September 30, 2012, respectively (in thousands).

			Fair Value Measurements Using
Description	December 31, 2011		Quoted Prices for Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total (Losses)
Accounts receivable	$	31,697	$	—	$	31,697	$	—	$	—
Accounts payable	$	31,434	$	—	$	31,434	$	—	$	—
Notes payable	$	71	$	—	$	71	$	—	$	—
Contingent consideration due to Ciprico	$	100	$	—	$	100	$	—	$	—

			Fair Value Measurements Using
Description	September 30, 2012		Quoted Prices for Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total (Losses)
Accounts receivable	$	28,333	$	—	$	28,333	$	—	$	—
Accounts payable	$	27,196	$	—	$	27,196	$	—	$	—
Credit facility borrowings	$	1,800	$	—	$	1,800	$	—	$	—

Assets Measured at Fair Value on a Recurring Basis

			Fair Value Measurements Using
Description	December 31, 2011		Quoted Prices for Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total (Losses)
	(in thousands)
Cash and cash equivalents	$	46,168	$	46,168	$	—	$	—	$	—

			Fair Value Measurements Using
Description	September 30, 2012		Quoted Prices for Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total (Losses)
	(in thousands)
Cash and cash equivalents	$	40,542	$	40,542	$	—	$	—	$	—