Summary Of Significant Accounting Policies (Accumulated Amortization Of Other Intangibles) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
Finite-Lived Intangible Assets [Line Items]
Client relationships	$ 32,577	$ 18,859
Software development costs	29,650	29,327
Other	4,735	3,065
Total other intangibles	66,962	51,251
Total accumulated amortization	(18,241)	(16,629)
Total other intangibles - net	48,721	34,622
Client Relationships Accumulated Amortization [Member]
Finite-Lived Intangible Assets [Line Items]
Total accumulated amortization	(4,255)	(3,623)
Software Development Costs Accumulated Amortization [Member]
Finite-Lived Intangible Assets [Line Items]
Total accumulated amortization	(12,939)	(12,016)
Other Accumulated Amortization [Member]
Finite-Lived Intangible Assets [Line Items]
Total accumulated amortization	$ (1,047)	$ (990)