Business Acquisition (Schedule Of Purchase Price Allocation) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012
Business Acquisition [Abstract]
Accounts receivable	$ 788
Prepaid expenses	70
Property, plant and equipment	530
Seat licenses	570
Trade name	2,400
Customer relationships	5,400
Goodwill	9,121
Total assets acquired	18,879
Accounts payable	(162)
Accrued expenses	(132)
Customer deposits	(67)
Capital leases payable	(671)
Deferred revenue	(29)
Total liabilities assumed	(1,061)
Total transaction value	$ 17,818

The amount of acquisition cost of a business combination allocated to assets acquired.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 141

-Paragraph 37

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.