Earnings Per Share (Tables)

3 Months Ended

Mar. 31, 2013

Earnings Per Share [Abstract]

Schedule Of Calculation Of Basic And Diluted Earnings Per Share

	For the Three Months Ended
	March 31,
	2012	2013
Weighted average common shares outstanding     for basic calculation	143,795,454	134,645,729
Add: Effect of stock options and restricted stock	703,313	186,829
Weighted average common shares outstanding     for diluted calculation	144,498,767	134,832,558