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Consolidated Statements of Stockholders' Equity (Parenthetical) - $ / shares
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Dividends declared per common share outstanding $ 1.10 $ 1.10 $ 1.10
Repurchase of restricted common stock, shares 58,756 37,805 37,565
Retained Earnings (Accumulated Deficit) [Member]      
Dividends declared per common share outstanding $ 1.10 $ 1.10 $ 1.10