Stocholders' Equity (Tables)

9 Months Ended

Sep. 30, 2015

Earnings Per Share [Abstract]

Schedule of Weighted Average Number of Shares [Table Text Block]

The following table provides the computation of diluted weighted average number of common shares outstanding:

	Three Months Ended September 30,		Nine Months Ended September 30,
	2015	2014	2015	2014
Computation of diluted weighted average shares outstanding:
Basic weighted average shares outstanding	52,617,245	52,512,474	52,075,388	51,658,823
Incremental shares from assumed exercise of stock options and vesting of restricted stock	1,784,106	2,107,319	1,725,448	2,081,328
Incremental shares from assumed conversion of convertible notes	143,412	—	143,412	—
Diluted weighted average shares outstanding	54,544,763	54,619,793	53,944,248	53,740,151