Weighted Average Shares Outstanding and Net Income (Loss) Per Share (Tables)

12 Months Ended

Dec. 31, 2016

Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]

The following table presents a reconciliation of the weighted average shares outstanding used in calculating basic and diluted net income per share as well as the calculation of basic and diluted net income per share (in thousands except per share amounts):



Years Ended December 31,	2016		2015		2014
Numerator (basic and diluted):
Net income allocated to common shareholders for basic calculation	$	57,122	$	60,485	$	25,346

Denominator:
Weighted average common shares outstanding, basic	39,557		39,337		39,096
Dilutive effect of stock options and restricted stock units	668		531		699
Weighted average common shares outstanding, diluted	40,225		39,868		39,795
Net income per share, basic	$	1.44	$	1.54	$	0.65
Net income per share, diluted	$	1.42	$	1.52	$	0.64