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Segment And Related Information (Narrative) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Segment Reporting Information [Line Items]
Capital expenditure for purchase of buildings and land	$ 12,278	$ 4,930	$ 12,352
Enterprise Software Solutions [Member]
Segment Reporting Information [Line Items]
Capital expenditure for purchase of buildings and land	$ 6,600		$ 11,200
Appraisal And Tax Software Solutions And Services [Member]
Segment Reporting Information [Line Items]
Percentage accountable by major customers	10.00%	10.00%	10.40%
Number of major customers	0	0	1

The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets.

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