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Consolidated Condensed Statements of Comprehensive Income (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Statement of Comprehensive Income [Abstract]
Unrealized net holding gain on securities available-for-sale, Tax expense	$ 1,621	$ 2,343	$ 2,171	$ 8,633

X

- Definition

Other Comprehensive Income Loss Available For Sale Securities Including Reclassification Adjustment Tax

+ References

No definition available.

+ Details

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Namespace Prefix:	prk_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- References

No definition available.

+ Details

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