First Niagara Financial Group Inc.'s acquisition of a western Pennsylvania branch network from PNC Financial Services Group Inc. is working out better than it had expected.

In a conference call announcing fourth-quarter earnings Thursday, the Lockport, N.Y., company reported a 95% retention rate of deposits from the 57 branches. It had expected losing 25% to 35% of the deposits following the deal for the branches, which PNC inherited with its acquisition of National City Corp.

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