Three months ended
June 30,

Six months ended
June 30,

2012

2011

2012

2011

Numerator:

Net income attributable to Waste Connections for basic and diluted earnings per share

$

42,415

$

44,413

$

73,719

$

80,952

Denominator:

Basic shares outstanding

123,466,890

113,509,668

119,327,512

113,514,439

Dilutive effect of stock options and warrants

315,329

451,173

327,538

463,899

Dilutive effect of restricted stock units

245,398

347,869

296,989

376,641

Diluted shares outstanding

124,027,617

114,308,710

119,952,039

114,354,979