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Business Segment Information (Schedule Of Additional Information Pertaining To Business Segments) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Segment Reporting Information [Line Items]
Capital Expenditures	$ 14,086	$ 15,375
Depreciation	6,447	5,995
Amortization	11,012	10,358
Private Banks [Member]
Segment Reporting Information [Line Items]
Capital Expenditures	8,712	8,502
Depreciation	3,181	3,097
Amortization	7,711	7,251
Investment Advisors [Member]
Segment Reporting Information [Line Items]
Capital Expenditures	2,852	3,318
Depreciation	976	838
Amortization	2,553	2,400
Institutional Investors [Member]
Segment Reporting Information [Line Items]
Capital Expenditures	796	947
Depreciation	334	303
Amortization	399	375
Investment Managers [Member]
Segment Reporting Information [Line Items]
Capital Expenditures	1,322	2,048
Depreciation	1,190	999
Amortization	266	250
Investments In New Businesses [Member]
Segment Reporting Information [Line Items]
Capital Expenditures	94	151
Depreciation	548	563
Amortization	26	25
Total From Business Segments [Member]
Segment Reporting Information [Line Items]
Capital Expenditures	13,776	14,966
Depreciation	6,229	5,800
Amortization	10,955	10,301
Corporate Overhead [Member]
Segment Reporting Information [Line Items]
Capital Expenditures	310	409
Depreciation	218	195
Amortization	$ 57	$ 57

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
-Topic 230
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- 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

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