Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Net Income	$ 20,742	$ 19,182	$ 34,477	$ 32,420
Basic EPS, Shares	79,906	81,351	80,028	81,611
Basic EPS, Per Share Amount	$ 0.26	$ 0.24	$ 0.43	$ 0.40
Effect of restricted stock	$ 0	$ 0	$ 0	$ 0
Effect of restricted stock, Shares	51	64	53	69
Diluted EPS, Net Income	$ 20,742	$ 19,182	$ 34,477	$ 32,420
Diluted EPS, Shares	79,957	81,415	80,081	81,680
Diluted EPS, Per Share Amount	$ 0.26	$ 0.24	$ 0.43	$ 0.40