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Stockholders' Equity (Dividend) (Details) - USD ($)
$ / shares in Units, $ in Thousands
1 Months Ended 3 Months Ended 6 Months Ended
Jul. 31, 2019
Jun. 30, 2019
Mar. 31, 2019
Jul. 01, 2018
Jun. 30, 2019
Jul. 01, 2018
Dividends Payable [Line Items]            
Common stock, dividends, per share, cash paid   $ 0.10 $ 0.10   $ 0.20  
Dividends, common stock, cash   $ 9,227 $ 9,140 $ 8,363 $ 18,367 $ 16,734
Common stock, dividends per share   $ 0.1   $ 0.09 $ 0.2 $ 0.18
Subsequent event [Member]            
Dividends Payable [Line Items]            
Common stock, dividends per share $ 0.10          
Dividends payable, date to be paid Aug. 21, 2019          
Dividends payable, date of record Aug. 12, 2019