Earnings Per Share (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Earnings Per Share [Abstract]
Net income	$ 22,737	$ 15,868	$ 63,289	$ 54,740
Basic EPS, Shares	87,778	84,837	87,737	84,799
Basic EPS, Per Share Amount	$ 0.26	$ 0.19	$ 0.72	$ 0.65
Effect of restricted stock	0	0
Effect of restricted stock, Shares	145	201	184	242
Diluted EPS, Net Income	$ 22,737	$ 15,868	$ 63,289	$ 54,740
Diluted EPS, Shares	87,923	85,038	87,921	85,041
Diluted EPS, Per Share Amount	$ 0.26	$ 0.19	$ 0.72	$ 0.64