Accounts Receivable and Other Receivables (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Receivables [Abstract]
Accounts Receivable, Gross	$ 49,177	$ 50,040
Less: allowance for doubtful accounts	(792)	(828)
Accounts Receivable, Net	48,385	49,212	[1]
Other receivables	3,405	4,036	[1]
Shipped not Invoiced		$ 1,300

[1] (A)As adjusted to reflect the impact of additional tax-related adjustments to the Company's purchase accounting for Continuous Computing in accordance with ASC 805-10 "Business Combinations". See Note 2 — Acquisitions for additional information.