No definition available.

Name:	hth_FinancingReceivableLoanPortfolioAdditionalInformationAbstract
Namespace Prefix:	hth_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of recovery of loans and lease receivables which had previously been fully or partially written-off as bad debts.

+ References

+ Details

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

- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

No definition available.

+ Details

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

- Definition

Amount of loans and leases that have been written off from both loan receivables and allowance reserve for credit loss.

+ References

+ Details

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

- References

No definition available.

+ Details

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

- Definition

The valuation allowance for financing receivables that are expected to be uncollectible that were collectively evaluated for impairment.

+ References

+ Details

Name:	us-gaap_FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The balance of financing receivables that were collectively evaluated for impairment.

+ References

+ Details

Name:	us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The balance of financing receivables that were individually evaluated for impairment.

+ References

+ Details

Name:	us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (g)
-URI http://asc.fasb.org/extlink&oid=35738203&loc=SL6953423-111524

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (c)(1)
-URI http://asc.fasb.org/extlink&oid=35738203&loc=SL6953423-111524

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 210.9-03.7(d))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (b)(1)(ii)
-URI http://asc.fasb.org/extlink&oid=6379141&loc=d3e15032-111544

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 03
-Paragraph 7
-Subparagraph d
-Article 9

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Staff Accounting Bulletin (SAB)
-Number Topic 6
-Section L
-Subsection 1

+ Details

Name:	us-gaap_LoansAndLeasesReceivableAllowance
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount before allowance and after deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=28367877&loc=d3e4428-111522

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=35738203&loc=d3e5074-111524

+ Details

Name:	us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of expense related to estimated loss from loan and lease transactions.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 225
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04.11)
-URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (c)(2)
-URI http://asc.fasb.org/extlink&oid=35738203&loc=SL6953423-111524

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 04
-Paragraph 11
-Article 9

+ Details

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

- Details

Name:	hth_ReceivableByIndemnificationStatusAxis=hth_CoveredMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=hth_CommercialAndIndustrialPortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=hth_RealEstatePortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=hth_ConstructionAndLandDevelopmentPortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis=hth_LoansImpairedAtAcquisitionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Covered Assets and Indemnification Asset - Allowance (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2016	Dec. 31, 2015
Changes in the allowance for loan losses
Balance, beginning of period	$ 45,415
Provision charged to (recapture from) operations operations	3,407	$ 2,687
Balance, end of period	48,450
Loan portfolio distributed by portfolio segment and impairment methodology
Total loans			$ 5,366,065	$ 5,220,040
Allowance for loan losses distributed by portfolio segment and impairment methodology
Total loans, allowance	45,415		48,450	45,415
Covered
Changes in the allowance for loan losses
Balance, beginning of period	1,532	4,611
Provision charged to (recapture from) operations operations	(278)	(107)
Loans charged off	(44)	(3,116)
Recoveries on charged off loans	7
Balance, end of period	1,217	1,388
Loan portfolio distributed by portfolio segment and impairment methodology
Loans individually evaluated for impairment			520	540
Loans collectively evaluated for impairment			149,001	157,780
Total loans			347,386	380,294
Allowance for loan losses distributed by portfolio segment and impairment methodology
Loans collectively evaluated for impairment, allowance			49	32
Total loans, allowance	1,532	4,611	1,217	1,532
Covered \| Commercial and industrial
Changes in the allowance for loan losses
Balance, beginning of period	758	1,193
Provision charged to (recapture from) operations operations	(314)	71
Loans charged off	(6)	(900)
Balance, end of period	438	364
Loan portfolio distributed by portfolio segment and impairment methodology
Loans collectively evaluated for impairment			2,117	1,294
Total loans			9,070	8,801
Allowance for loan losses distributed by portfolio segment and impairment methodology
Loans collectively evaluated for impairment, allowance			16	17
Total loans, allowance	758	1,193	438	758
Covered \| Real estate
Changes in the allowance for loan losses
Balance, beginning of period	774	3,334
Provision charged to (recapture from) operations operations	(23)	(192)
Loans charged off	(16)	(2,215)
Recoveries on charged off loans	7
Balance, end of period	742	927
Loan portfolio distributed by portfolio segment and impairment methodology
Loans collectively evaluated for impairment			141,980	147,502
Total loans			318,921	341,048
Allowance for loan losses distributed by portfolio segment and impairment methodology
Loans collectively evaluated for impairment, allowance			31	15
Total loans, allowance	774	3,334	742	774
Covered \| Construction and land development
Changes in the allowance for loan losses
Balance, beginning of period		84
Provision charged to (recapture from) operations operations	59	14
Loans charged off	(22)	(1)
Balance, end of period	37	97
Loan portfolio distributed by portfolio segment and impairment methodology
Loans individually evaluated for impairment			520	540
Loans collectively evaluated for impairment			4,904	8,984
Total loans			19,395	30,445
Allowance for loan losses distributed by portfolio segment and impairment methodology
Loans collectively evaluated for impairment, allowance			2
Total loans, allowance	37	$ 84	37
Covered \| PCI loans
Changes in the allowance for loan losses
Balance, beginning of period	1,500
Balance, end of period	1,168
Loan portfolio distributed by portfolio segment and impairment methodology
Total loans			197,865	221,974
Allowance for loan losses distributed by portfolio segment and impairment methodology
Total loans, allowance	1,500		1,168	1,500
Covered \| PCI loans \| Commercial and industrial
Changes in the allowance for loan losses
Balance, beginning of period	741
Balance, end of period	422
Loan portfolio distributed by portfolio segment and impairment methodology
Total loans			6,953	7,507
Allowance for loan losses distributed by portfolio segment and impairment methodology
Total loans, allowance	741		422	741
Covered \| PCI loans \| Real estate
Changes in the allowance for loan losses
Balance, beginning of period	759
Balance, end of period	711
Loan portfolio distributed by portfolio segment and impairment methodology
Total loans			176,941	193,546
Allowance for loan losses distributed by portfolio segment and impairment methodology
Total loans, allowance	759		711	759
Covered \| PCI loans \| Construction and land development
Changes in the allowance for loan losses
Balance, end of period	35
Loan portfolio distributed by portfolio segment and impairment methodology
Total loans			13,971	$ 20,921
Allowance for loan losses distributed by portfolio segment and impairment methodology
Total loans, allowance	$ 35		$ 35