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Statements of Consolidated Comprehensive Income (Loss) (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Statements of Consolidated Comprehensive Income [Abstract]
Net income	$ 9,284	$ 6,660	$ 24,013	$ 22,044
Other comprehensive income (loss), net of tax
Currency translation adjustment	2,660	(11,269)	774	(5,631)
Recognized net acturial loss (net of tax provision $71 and $39 for the three months ended September 30, 2012 and 2011, and net of tax provision $213 and $117 for the nine months ended September 30, 2012 and 2011)	117	65	350	193
Other comprehensive income (loss), net of tax	2,777	(11,204)	1,124	(5,438)
Comprehensive income (loss)	12,061	(4,544)	25,137	16,606
Less: comprehensive income attributable to noncontrolling interest	0	0	0	(50)
Comprehensive income (loss) attributable to PLPC	$ 12,061	$ (4,544)	$ 25,137	$ 16,556

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