Consolidated Condensed Statements of Comprehensive Income (Parenthetical) (USD $) In Thousands, unless otherwise specified	3 Months Ended	6 Months Ended
Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Statement of Comprehensive Income [Abstract]
Unrealized net holding loss on securities available-for-sale, Tax expense (benefit)	$ 7,042	$ (11,058)	$ 12,933	$ (12,340)

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

No definition available.

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