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Foreclosed Assets - Summary of Expenses Related to Foreclosed Real Estate (Detail) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Banking and Thrift [Abstract] |  |  |
Net loss (gain) on sale | $ 3 | $ (71) | $ (252)
Operating expenses, net of rental income | 169 | 254 | 81
Total | $ 172 | $ 183 | $ (171)

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- Definition Foreclosed real estate gain loss on sale. + References No definition available. + Details
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- Definition Foreclosed real estate gain loss on sale net. + References No definition available. + Details
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- Definition Foreclosed real estate operating expense net. + References No definition available. + Details
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Namespace Prefix: | ccne_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- References No definition available. + Details
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