Summary Of Significant Accounting Policies (Accumulated Amortization Of Other Intangibles) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Finite-Lived Intangible Assets [Line Items]
Client relationships	$ 18,859	$ 11,459
Software development costs	29,327	19,139
Other	3,065	1,450
Total other intangibles	51,251	32,048
Total accumulated amortization	(16,629)	(11,947)
Total other intangibles - net	34,622	20,101
Client Relationships Accumulated Amortization [Member]
Finite-Lived Intangible Assets [Line Items]
Total accumulated amortization	(3,623)	(2,156)
Software Development Costs Accumulated Amortization [Member]
Finite-Lived Intangible Assets [Line Items]
Total accumulated amortization	(12,016)	(8,985)
Other Accumulated Amortization [Member]
Finite-Lived Intangible Assets [Line Items]
Total accumulated amortization	$ (990)	$ (806)