Stocholders' Equity (Tables)

6 Months Ended

Jun. 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 June 30,		Six Months Ended June 30,
	2014	2013	2014	2013
Computation of diluted weighted average shares outstanding:
Basic weighted average shares outstanding	51,675,775	49,889,640	51,231,997	49,697,176
Incremental shares from assumed exercise of stock options and vesting of restricted stock	2,097,984	1,628,000	2,047,785	1,425,634
Diluted weighted average shares outstanding	53,773,759	51,517,640	53,279,782	51,122,810