Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Article 12

-Section 13

-Sentence Column B

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- Definition

Fair value of the assets less the liabilities of a derivative or group of derivatives.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 10

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=35750535&loc=d3e13433-108611

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 45

-Paragraph 5

-URI http://asc.fasb.org/extlink&oid=6945355&loc=d3e41228-113958

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

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-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 15

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- Definition

Amount of increase (decrease) in the fair value of derivatives recognized in the income statement.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 4A

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5618551-113959

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-Name Accounting Standards Codification

-Topic 815

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-Subparagraph (a),(c),(d),(e)

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- Definition

Amount of right to receive cash collateral under master netting arrangements offset against derivative liabilities.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 45

-Paragraph 5

-URI http://asc.fasb.org/extlink&oid=6945355&loc=d3e41228-113958

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-Name Accounting Standards Codification

-Topic 210

-SubTopic 20

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-Paragraph 3

-Subparagraph (b)

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Derivative Financial Instruments (Details) (USD $)	3 Months Ended
Derivative Financial Instruments (Details) (USD $)	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Commitments to Sell MBSs
Derivative financial instruments
Cash collateral advanced to offset net derivative liability	$ 8,800,000		$ 6,600,000
Not Designated as Hedging Instrument \| Prime Lending
Derivative financial instruments
Net gain (loss) due to changes in the fair value of the derivative instruments	18,900,000	(1,600,000)
Not Designated as Hedging Instrument \| Hilltop Broker-Dealers
Derivative financial instruments
Net gain (loss) due to changes in the fair value of the derivative instruments	8,600,000	2,800,000
Not Designated as Hedging Instrument \| Commitments to Purchase MBSs
Derivative financial instruments
Notional Amount	2,951,103,000		510,553,000
Estimated Fair Value	12,596,000		6,040,000
Not Designated as Hedging Instrument \| Commitments to Sell MBSs
Derivative financial instruments
Notional Amount	4,929,365,000		1,968,768,000
Estimated Fair Value	(20,667,000)		(12,566,000)
Interest Rate Lock Commitments \| Not Designated as Hedging Instrument
Derivative financial instruments
Notional Amount	1,282,637,000		621,216,000
Estimated Fair Value	35,106,000		17,057,000
Interest Rate Swap and Swaptions
Derivative financial instruments
Notional Amount	102,110,000		83,000,000
Estimated Fair Value	566,000		425,000
Cash collateral advanced to offset net derivative liability	$ 3,600,000		$ 3,300,000