The following table sets forth the computation of basic and diluted earnings per common share utilizing the two-class method.

Earnings Per Share


(in thousands except per share data)	Three Months Ended Jun. 30, 2017		Three Months Ended Jun. 30, 2016		Six Months Ended Jun. 30, 2017		Six Months Ended Jun. 30, 2016
Numerator:
Net income attributable to common shareholders	$	19,355	$	43,456	$	39,785	$	71,796
Denominator:
Denominator for basic earnings per share – weighted average shares		46,365		41,980		46,335		40,196
Effect of Dilutive Securities:
Stock options and non-vested stock		113		247		113		249

Denominator for diluted earnings per share – adjusted weighted average shares and assumed conversion		46,478		42,227		46,448		40,445
Basic earnings per common share attributable to common shareholders	$	0.42	$	1.04	$	0.86	$	1.79
Diluted earnings per common share attributable to common shareholders	$	0.42	$	1.03	$	0.86	$	1.78

Earnings Per Unit

The following table sets forth the computation of basic and diluted earnings per common unit utilizing the two-class method.


(in thousands except per unit data)	Three Months Ended Jun. 30, 2017		Three Months Ended Jun. 30, 2016		Six Months Ended Jun. 30, 2017		Six Months Ended Jun. 30, 2016
Numerator:
Net income attributable to common unitholders	$	19,355	$	43,456	$	39,785	$	71,796
Denominator:
Denominator for basic earnings per unit – weighted average units		46,365		41,980		46,335		40,196
Effect of Dilutive Securities:
Stock options and non-vested stock		113		247		113		249

Denominator for diluted earnings per unit – adjusted weighted average units and assumed conversion		46,478		42,227		46,448		40,445
Basic earnings per common unit attributable to common unitholders	$	0.42	$	1.04	$	0.86	$	1.79
Diluted earnings per common unit attributable to common unitholders	$	0.42	$	1.03	$	0.86	$	1.78