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Common Stock and Dividends (Tables)
6 Months Ended
Jun. 30, 2018
Stockholders' Equity Note [Abstract]  
Schedule of Dividends Declared and Paid Dividends declared and paid on a per share basis were as follows:
 
Three Months Ended
June 30,
Six Months Ended
June 30,
2018201720182017
Dividends declared $0.11 $0.10 $0.22 $0.20 
Dividends paid $0.11 $0.10 $0.22 $0.20