For the three month period ended June 30

For the six month period ended June 30

2012

2011

2012

2011

Numerator

Amount attributable to PLPC shareholders

Net income attributable to PLPC

$

6,596

$

8,386

$

14,729

$

15,384

Denominator

Determination of shares

Weighted-average common shares outstanding

5,332

5,263

5,333

5,268

Dilutive effect - share-based awards

109

130

107

122

Diluted weighted-average common shares outstanding

5,441

5,393

5,440

5,390

Earnings per common share attributable to PLPC shareholders

Basic

$

1.24

$

1.59

$

2.76

$

2.92

Diluted

$

1.21

$

1.55

$

2.71

$

2.85