Percentage points added to the reference rate to compute the variable rate on the debt instrument.

No definition available.

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- Definition

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
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-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

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- Definition

Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

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- Definition

Amount of unused borrowing capacity under the long-term financing arrangement that is available to the entity as of the balance sheet date.

+ References

+ Details

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- Definition

Amount of the cost of borrowed funds accounted for as interest expense for debt.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.8)
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

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- Definition

The effective interest rate at the end of the reporting period.

+ References

+ Details

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

+ Details

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- Definition

Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

+ References

+ Details

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- Definition

Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(16))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 2: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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-Section S99
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-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

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-Name Accounting Standards Codification
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-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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- Definition

Represents the number of broker-dealer subsidiaries of the entity.

+ References

No definition available.

+ Details

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- Definition

Represents the number of secured credit facilities.

+ References

No definition available.

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Borrowings - Broker-Dealer Credit Facilities (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2017 USD ($) item	Mar. 31, 2016 USD ($)	Dec. 31, 2016 USD ($)	Oct. 27, 2016 USD ($)	Jul. 18, 2016 USD ($)	Apr. 15, 2015 USD ($)
Long-Term Borrowings
Borrowing Outstanding	$ 570,071
Borrowing Outstanding, net	$ 565,317		$ 564,957
Number of broker-dealer subsidiaries \| item	2
Interest expense	$ 6,828	$ 7,101
Broker-Dealer Credit Facilities
Long-Term Borrowings
Financing Available	200,000		200,000
Borrowing Outstanding	$ 22,000		25,000
Number of secured credit facilities \| item	2
Broker-Dealer Credit Facility on an uncommitted basis
Long-Term Borrowings
Financing Available	$ 125,000		125,000
Borrowing Outstanding	22,000		$ 25,000
Maximum borrowing capacity	$ 125,000
Interest rate (as a percent)	1.91%		1.66%
Interest expense	$ 400	300
Broker-Dealer Credit Facility on committed basis
Long-Term Borrowings
Financing Available	$ 75,000		$ 75,000
Maximum borrowing capacity					$ 75,000
Credit facility term	364 days
Broker-Dealer Credit Facility on committed basis \| LIBOR rate
Long-Term Borrowings
Interest rate margin (as a percent)	1.25%
Broker-Dealer Credit Facility on committed basis \| Base rate
Long-Term Borrowings
Interest rate margin (as a percent)	1.25%
Short-Term Credit Facilities
Long-Term Borrowings
Financing Available	$ 493,000		493,000
Borrowing Outstanding	241,324		309,086
Interest expense	1,700	$ 1,700
Total Short-term credit facilities
Long-Term Borrowings
Financing Available	493,000		493,000
Borrowing Outstanding	241,324		309,086
Senior Secured Credit Facility
Long-Term Borrowings
Borrowing Outstanding	538,650		540,000
Borrowing Outstanding, net	533,961		535,104
Maximum borrowing capacity				$ 100,000
Revolving credit facility
Long-Term Borrowings
Unused Available Capacity	100,000		100,000
Maximum borrowing capacity						$ 100,000
Total Long-term borrowings
Long-Term Borrowings
Borrowing Outstanding, net	565,317		564,957
Unused Available Capacity	100,000		100,000
SBI Bonds
Long-Term Borrowings
Borrowing Outstanding	31,421		29,925
Borrowing Outstanding, net	$ 31,356		$ 29,853