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Preferred stocks	12 Months Ended
Preferred stocks	Dec. 31, 2019
Class of Stock Disclosures [Abstract]
Preferred stocks	Preferred Stock The Company currently has 2.0 million shares of preferred stock authorized to be issued with a $100 par value. At December 31, 2019, there were no shares outstanding. At December 31, 2018, there were no shares outstanding. On April 1, 2017, the Company redeemed all outstanding 4.50% Series and 4.70% Series preferred stocks at $105 per share and $102 per share, respectively, for a repurchase price of approximately $15.6 million and $300,000 of redeemable preferred stock classified as long-term debt.