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Business Segment Information (Schedule Of Additional Information Pertaining To Business Segments) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Segment Reporting Information [Line Items]
Capital Expenditures	$ 7,792	$ 21,393
Depreciation	5,704	5,432
Amortization	8,242	7,622
Private Banks [Member]
Segment Reporting Information [Line Items]
Capital Expenditures	4,851	11,842
Depreciation	3,933	3,728
Amortization	5,336	4,685
Investment Advisors [Member]
Segment Reporting Information [Line Items]
Capital Expenditures	1,775	4,141
Depreciation	509	494
Amortization	1,957	1,716
Institutional Investors [Member]
Segment Reporting Information [Line Items]
Capital Expenditures	363	1,231
Depreciation	230	262
Amortization	302	302
Investment Managers [Member]
Segment Reporting Information [Line Items]
Capital Expenditures	623	3,053
Depreciation	462	476
Amortization	202	201
Investments In New Businesses [Member]
Segment Reporting Information [Line Items]
Capital Expenditures	88	272
Depreciation	454	334
Amortization	388	277
Total From Business Segments [Member]
Segment Reporting Information [Line Items]
Capital Expenditures	7,700	20,539
Depreciation	5,588	5,294
Amortization	8,185	7,181
Corporate Overhead [Member]
Segment Reporting Information [Line Items]
Capital Expenditures	92	854
Depreciation	116	138
Amortization	$ 57	$ 441

X

- Definition

The aggregate amount of recurring noncash expense charged against earnings in the period to allocate the cost of assets over their estimated remaining economic lives.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (b)

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X

- Definition

Future cash outflow to pay for purchases of fixed assets that have occurred.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 50

-Paragraph 4

-URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4313-108586



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-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 50

-Paragraph 3

-URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4304-108586



Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 50

-Paragraph 5

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X

- Definition

The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 95

-Paragraph 28

-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.



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher AICPA

-Name Accounting Principles Board Opinion (APB)

-Number 12

-Paragraph 5

-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.



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-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

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-URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585

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