Earnings Per Share (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Earnings Per Share [Abstract]
Net income	$ 26,472	$ 19,138	$ 40,551	$ 38,874
Basic EPS, Shares	87,728	84,789	87,716	84,780
Basic EPS, Per Share Amount	$ 0.30	$ 0.23	$ 0.46	$ 0.46
Effect of restricted stock	0	0	0
Effect of restricted stock, Shares	172	250	192	262
Diluted EPS, Net Income	$ 26,472	$ 19,138	$ 40,551	$ 38,874
Diluted EPS, Shares	87,900	85,039	87,908	85,042
Diluted EPS, Per Share Amount	$ 0.30	$ 0.23	$ 0.46	$ 0.46