Fair Value Measurements (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Jun. 30, 2012	Dec. 31, 2011
Fair Value, Assets and Liabilities Measured on Recurring Basis
Cash and cash equivalents	$ 40,542		$ 46,168
Contingent consideration, percentage		6.67%
Level 1
Fair Value, Assets and Liabilities Measured on Recurring Basis
Cash and cash equivalents	40,542		46,168
Level 2
Fair Value, Assets and Liabilities Measured on Recurring Basis
Accounts receivable	28,333		31,697
Accounts payable	27,196		31,434
Notes payable			71
Contingent consideration due to Ciprico			100
Credit facility borrowings	1,800
Estimate of Fair Value
Fair Value, Assets and Liabilities Measured on Recurring Basis
Accounts receivable	28,333		31,697
Accounts payable	27,196
Notes payable			71
Contingent consideration due to Ciprico			100
Credit facility borrowings	$ 1,800