Business Segment Information (Schedule Of Additional Information Pertaining To Business Segments) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 31, 2014	Mar. 31, 2013
Segment Reporting Information [Line Items]
Capital Expenditures	$ 17,035	$ 7,792
Depreciation	5,584	5,704
Amortization	9,214	8,242
Private Banks [Member]
Segment Reporting Information [Line Items]
Capital Expenditures	8,798	4,851
Depreciation	3,732	3,933
Amortization	5,952	5,336
Investment Advisors [Member]
Segment Reporting Information [Line Items]
Capital Expenditures	3,589	1,775
Depreciation	491	509
Amortization	2,197	1,957
Institutional Investors [Member]
Segment Reporting Information [Line Items]
Capital Expenditures	1,288	363
Depreciation	209	230
Amortization	341	302
Investment Managers [Member]
Segment Reporting Information [Line Items]
Capital Expenditures	2,135	623
Depreciation	512	462
Amortization	227	202
Investments In New Businesses [Member]
Segment Reporting Information [Line Items]
Capital Expenditures	580	88
Depreciation	530	454
Amortization	440	388
Total From Business Segments [Member]
Segment Reporting Information [Line Items]
Capital Expenditures	16,390	7,700
Depreciation	5,474	5,588
Amortization	9,157	8,185
Corporate Overhead [Member]
Segment Reporting Information [Line Items]
Capital Expenditures	645	92
Depreciation	110	116
Amortization	$ 57	$ 57

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.

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)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585

+ Details

Name:	us-gaap_AdjustmentForAmortization
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- 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 5

-URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4332-108586

Reference 2: 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

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

-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

+ Details

Name:	us-gaap_CapitalExpendituresIncurredButNotYetPaid
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- 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

+ Details

Name:	us-gaap_Depreciation
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

Name:	us-gaap_SegmentReportingInformationLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration