Stocholders' Equity (Tables)

9 Months Ended

Sep. 30, 2014

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,
	2014	2013	2014	2013
Computation of diluted weighted average shares outstanding:
Basic weighted average shares outstanding	52,512,474	50,093,786	51,658,823	49,829,379
Incremental shares from assumed exercise of stock options and vesting of restricted stock	2,107,319	2,025,802	2,081,328	1,664,274
Incremental shares from assumed conversion of convertible debentures	—	80,884	—	85,991
Diluted weighted average shares outstanding	54,619,793	52,200,472	53,740,151	51,579,644