Consolidated Statements of Shareholders' Equity (Unaudited) Parenthetical - $ / shares  | 
3 Months Ended | 9 Months Ended | ||||||
|---|---|---|---|---|---|---|---|---|
Sep. 30, 2019  | 
Jun. 30, 2019  | 
Mar. 31, 2019  | 
Sep. 30, 2018  | 
Jun. 30, 2018  | 
Mar. 31, 2018  | 
Sep. 30, 2019  | 
Sep. 30, 2018  | 
|
| Common Stock, Dividends, Per Share, Declared | $ 0.18 | $ 0.18 | $ 0.18 | $ 0.15 | $ 0.15 | $ 0.15 | $ 0.54 | $ 0.45 | 
| X | ||||||||||
- Definition Aggregate dividends declared during the period for each share of common stock outstanding. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
  |