Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Earnings Per Share [Abstract]
Net income	$ 14,036	$ 14,377
Basic EPS, Shares	83,292	83,369
Basic EPS, Per Share Amount	$ 0.17	$ 0.17
Effect of restricted stock	$ 0	$ 0
Effect of restricted stock, Shares	45	91
Diluted EPS, Net Income	$ 14,036	$ 14,377
Diluted EPS, Shares	83,337	83,460
Diluted EPS, Per Share Amount	$ 0.17	$ 0.17