Name:	crfn_EndBalanceAbstract
Namespace Prefix:	crfn_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Name:	crfn_EndingBalanceAbstract
Namespace Prefix:	crfn_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The balance of financing receivables that were acquired with deteriorated credit quality.

+ 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 (h)

-URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953423-111524

+ Details

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

- Definition

A valuation allowance for financing receivables that are expected to be uncollectible.

+ 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 (c)(1)

-URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953423-111524

+ Details

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

- Definition

The valuation allowance for financing receivables acquired with deteriorated credit quality.

+ 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=7512638&loc=SL6953423-111524

+ Details

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

- Definition

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

+ 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=7512638&loc=SL6953423-111524

+ Details

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

- Definition

Amount of valuation allowance for financing receivables that are expected to be uncollectible that were individually evaluated for impairment.

+ 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=7512638&loc=SL6953423-111524

+ Details

Name:	us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of recovery of financing receivables doubtful of collection that were previously charged off.

+ 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 (c)(4)

-URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953423-111524

+ Details

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

- Definition

Amount of direct write-downs of financing receivables charged against the allowance.

+ 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 (c)(3)

-URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953423-111524

+ Details

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

- 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 investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 14A

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953550-111524

+ Details

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

- Details

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

- Definition

The sum of the periodic provision charged to earnings, based on an assessment of uncollectibility from the counterparty on account of loan, lease or other credit losses, to reduce these accounts to the amount that approximates their net realizable value.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 95

-Paragraph 28

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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=6943989&loc=d3e3602-108585

Reference 3: 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 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Paragraph 11

-Article 9

Reference 5: 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=7512638&loc=SL6953423-111524

Reference 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher AICPA

-Name Audit and Accounting Guide (AAG)

-Number AAG-DEP

-Paragraph 168, 169, 170

-IssueDate 2006-05-01

-Chapter 5

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

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

LOANS AND ALLOWANCE FOR LOAN LOSSES (Details 3) (USD $) In Thousands, unless otherwise specified																				3 Months Ended		5 Months Ended	6 Months Ended	3 Months Ended		5 Months Ended	6 Months Ended	3 Months Ended		5 Months Ended	6 Months Ended	3 Months Ended		5 Months Ended	6 Months Ended	3 Months Ended		5 Months Ended	6 Months Ended	3 Months Ended		5 Months Ended	6 Months Ended	3 Months Ended		5 Months Ended	6 Months Ended	3 Months Ended		5 Months Ended	6 Months Ended	1 Months Ended
	Jun. 30, 2013 Loans Originated By Company [Member]	Dec. 31, 2012 Loans Originated By Company [Member]	Jun. 30, 2013 Loans Originated By Company [Member] Commercial Real Estate [Member]	Dec. 31, 2012 Loans Originated By Company [Member] Commercial Real Estate [Member]	Jun. 30, 2013 Loans Originated By Company [Member] Commercial and Industrial Loans [Member]	Dec. 31, 2012 Loans Originated By Company [Member] Commercial and Industrial Loans [Member]	Jun. 30, 2013 Loans Originated By Company [Member] Construction Loans [Member]	Dec. 31, 2012 Loans Originated By Company [Member] Construction Loans [Member]	Jun. 30, 2013 Loans Originated By Company [Member] Residential Real Estate [Member]	Dec. 31, 2012 Loans Originated By Company [Member] Residential Real Estate [Member]	Jun. 30, 2013 Loans Originated By Company [Member] Consumer Construction and development [Member]	Dec. 31, 2012 Loans Originated By Company [Member] Consumer Construction and development [Member]	Jun. 30, 2013 Loans Originated By Company [Member] Home Equity [Member]	Dec. 31, 2012 Loans Originated By Company [Member] Home Equity [Member]	Jun. 30, 2013 Loans Originated By Company [Member] Consumer Loan [Member]	Dec. 31, 2012 Loans Originated By Company [Member] Consumer Loan [Member]	Jun. 30, 2013 Successor [Member]	Dec. 31, 2012 Successor [Member]	Jun. 30, 2013 Successor [Member] Commercial Real Estate [Member]	Jun. 30, 2013 Successor [Member] Loans Originated By Company [Member]	Jun. 30, 2012 Successor [Member] Loans Originated By Company [Member]	Jun. 30, 2012 Successor [Member] Loans Originated By Company [Member]	Jun. 30, 2013 Successor [Member] Loans Originated By Company [Member]	Jun. 30, 2013 Successor [Member] Loans Originated By Company [Member] Commercial Real Estate [Member]	Jun. 30, 2012 Successor [Member] Loans Originated By Company [Member] Commercial Real Estate [Member]	Jun. 30, 2012 Successor [Member] Loans Originated By Company [Member] Commercial Real Estate [Member]	Jun. 30, 2013 Successor [Member] Loans Originated By Company [Member] Commercial Real Estate [Member]	Jun. 30, 2013 Successor [Member] Loans Originated By Company [Member] Commercial and Industrial Loans [Member]	Jun. 30, 2012 Successor [Member] Loans Originated By Company [Member] Commercial and Industrial Loans [Member]	Jun. 30, 2012 Successor [Member] Loans Originated By Company [Member] Commercial and Industrial Loans [Member]	Jun. 30, 2013 Successor [Member] Loans Originated By Company [Member] Commercial and Industrial Loans [Member]	Jun. 30, 2013 Successor [Member] Loans Originated By Company [Member] Construction Loans [Member]	Jun. 30, 2012 Successor [Member] Loans Originated By Company [Member] Construction Loans [Member]	Jun. 30, 2012 Successor [Member] Loans Originated By Company [Member] Construction Loans [Member]	Jun. 30, 2013 Successor [Member] Loans Originated By Company [Member] Construction Loans [Member]	Jun. 30, 2013 Successor [Member] Loans Originated By Company [Member] Residential Real Estate [Member]	Jun. 30, 2012 Successor [Member] Loans Originated By Company [Member] Residential Real Estate [Member]	Jun. 30, 2012 Successor [Member] Loans Originated By Company [Member] Residential Real Estate [Member]	Jun. 30, 2013 Successor [Member] Loans Originated By Company [Member] Residential Real Estate [Member]	Jun. 30, 2013 Successor [Member] Loans Originated By Company [Member] Consumer Construction and development [Member]	Jun. 30, 2012 Successor [Member] Loans Originated By Company [Member] Consumer Construction and development [Member]	Jun. 30, 2012 Successor [Member] Loans Originated By Company [Member] Consumer Construction and development [Member]	Jun. 30, 2013 Successor [Member] Loans Originated By Company [Member] Consumer Construction and development [Member]	Jun. 30, 2013 Successor [Member] Loans Originated By Company [Member] Home Equity [Member]	Jun. 30, 2012 Successor [Member] Loans Originated By Company [Member] Home Equity [Member]	Jun. 30, 2012 Successor [Member] Loans Originated By Company [Member] Home Equity [Member]	Jun. 30, 2013 Successor [Member] Loans Originated By Company [Member] Home Equity [Member]	Jun. 30, 2013 Successor [Member] Loans Originated By Company [Member] Consumer Loan [Member]	Jun. 30, 2012 Successor [Member] Loans Originated By Company [Member] Consumer Loan [Member]	Jun. 30, 2012 Successor [Member] Loans Originated By Company [Member] Consumer Loan [Member]	Jun. 30, 2013 Successor [Member] Loans Originated By Company [Member] Consumer Loan [Member]	Jan. 31, 2012 Predecessor [Member] Acquired Loans [Member]	Jan. 31, 2012 Predecessor [Member] Acquired Loans [Member] Commercial Real Estate [Member]	Jan. 31, 2012 Predecessor [Member] Acquired Loans [Member] Commercial and Industrial Loans [Member]	Jan. 31, 2012 Predecessor [Member] Acquired Loans [Member] Construction Loans [Member]	Jan. 31, 2012 Predecessor [Member] Acquired Loans [Member] Residential Real Estate [Member]	Jan. 31, 2012 Predecessor [Member] Acquired Loans [Member] Consumer Loan [Member]
Allowance for loan losses
Beginning balance																			$ 3,069	$ 5,527	$ 1,607	$ 1,276	$ 3,998	$ 2,584	$ 341	$ 505	$ 1,524	$ 831	$ 409	$ 218	$ 798	$ 1,005	$ 144	$ 305	$ 597	$ 959	$ 304	$ 154	$ 940	$ 17	$ 28	$ 28	$ 18	$ 114	$ 356	$ 51	$ 85	$ 17	$ 25	$ 15	$ 36	$ 2,131	$ 663	$ 324	$ 534	$ 601	$ 9
Charge-offs																				(651)	(695)	(1,248)	(1,152)	0	0	0	(14)	(18)	(103)	(118)	(77)	(57)	(46)	(305)	(117)	(231)	(61)	(72)	(424)	0	(11)	(11)	0	(210)	(458)	(718)	(302)	(135)	(16)	(24)	(218)	(1)	0	0	(1)	0	0
Recoveries																				57	85	100	147	4	0	0	18	0	5	5	8	38	0	15	47	9	75	75	62	0	5	5	0	3	0	0	5	3	0	0	7	2	0	2	0	0	0
Provision for loan losses																				1,492	2,046	2,915	3,432	481	580	416	1,541	542	274	480	626	13	278	361	472	115	438	599	274	17	6	6	16	179	458	1,023	298	145	12	30	205	195	48	21	98	26	2
Ending balance																			3,069	6,425	3,043	3,043	6,425	3,069	921	921	3,069	1,355	585	585	1,355	999	376	376	999	852	756	756	852	34	28	28	34	86	356	356	86	30	21	21	30	2,327	711	347	631	627	11
Ending balance:
Individually evaluated for impairment	81	46	21	14	0	0	51	8	0	9	0	0	9	14	0	1
Collectively evaluated for impairment	4,258	2,674	1,769	1,067	1,355	798	543	322	454	379	34	18	77	71	26	19
Purchased credit-impaired	2,086	1,278	1,279	443	0	0	405	267	398	552	0	0	0	0	4	16
Ending balance:
Individually evaluated for impairment	7,937	5,130	2,889	1,697	21	0	1,822	415	1,243	1,452	0	0	1,854	1,342	108	224
Collectively evaluated for impairment	1,111,765	555,276	529,241	266,001	209,397	85,356	85,934	31,741	154,567	100,794	30,822	5,392	92,478	62,101	9,326	3,891
Purchased credit-impaired	204,989	203,107	119,891	125,257	12,683	13,345	38,212	40,410	29,724	23,031	2,568	811	1,432	43	479	210
Recorded Investment	$ 1,324,691	$ 763,513	$ 652,021	$ 392,955	$ 222,101	$ 98,701	$ 125,968	$ 72,566	$ 185,534	$ 125,277	$ 33,390	$ 6,203	$ 95,764	$ 63,486	$ 9,913	$ 4,325	$ 7,937	$ 5,130