Consolidated Balance Sheets (Unaudited) (Parenthetical) (USD $) In Thousands, except Share data	Jun. 30, 2011	Dec. 31, 2010
ASSETS
Accounts receivable, less allowances	$ 1,639	$ 1,213
PLPC Shareholders' equity:
Common stock, par value	$ 2	$ 2
Common stock, shares authorized	15,000,000	15,000,000
Common stock, shares issued	5,258,210	5,270,977
Common stock, shares outstanding	5,258,210	5,270,977
Treasury shares, at par	623,138	586,746