Represent that percenage of cah paid as a part of business consideration for business combination.

No definition available.

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Namespace Prefix:	fdef_
Data Type:	num:percentItemType
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- Definition

Represent that percenage of share issued as a part of business consideration for business combination.

+ References

No definition available.

+ Details

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Namespace Prefix:	fdef_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

It represents the cash per share to be paid to each shareholder.

+ References

No definition available.

+ Details

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Namespace Prefix:	fdef_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Amount of deposit liability due after one year or the normal operating cycle, if longer, assumed at the acquisition date.

+ References

No definition available.

+ Details

Name:	fdef_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesDeposit
Namespace Prefix:	fdef_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

It represents the closing price per share relating to business combination..

+ References

No definition available.

+ Details

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Namespace Prefix:	fdef_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Cash flow in connection with cancellation of outstanding options.

+ References

No definition available.

+ Details

Name:	fdef_BusinesscombinationPaymentForCancellationOfOptions
Namespace Prefix:	fdef_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 30
-Paragraph 7
-URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6578-128477

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 30
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6613-128477

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

- Definition

Amount of assets acquired at the acquisition date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=73530397&loc=d3e4845-128472

+ Details

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

- Definition

Amount of long-term debt due after one year or the normal operating cycle, if longer, assumed at the acquisition date.

+ References

+ Details

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

- Definition

Ratio applied to the conversion of stock split, for example but not limited to, one share converted to two or two shares converted to one.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 4
-Subparagraph (SAB TOPIC 4.C)
-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187143-122770

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Stock Split
-URI http://asc.fasb.org/extlink&oid=6525746

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Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_BusinessAcquisitionAxis=fdef_CommercialBancsharesIncMember
Namespace Prefix:
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Period Type:

Acquisition (Details Textual) - Commercial Bancshares, Inc [Member] $ / shares in Units, $ in Millions	1 Months Ended
	Aug. 31, 2016 USD ($) $ / shares	Aug. 23, 2016	Aug. 22, 2016 $ / shares	Jun. 30, 2016 USD ($)
Stockholders' Equity Note, Stock Split, Conversion Ratio	1.1808
Business Combination Consideration Transferred,Cash Per Share \| $ / shares	$ 51.00
Business Combination Consideration Transferred In Shares,Percentage		80.00%
Business Combination Consideration Transferred In Cash,Percentage		20.00%
Business Combination,Closing Price Per Share \| $ / shares			$ 43.19
Business Combination, Consideration Transferred	$ 63.0
BusinessCombination ,Payment For Cancellation Of Options	$ 1.5
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets				$ 342.0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Long-term Debt				298.0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Deposit				$ 301.0