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Subsequent Events	6 Months Ended
	Jun. 30, 2023
Subsequent Events
Subsequent Events	11.          Subsequent Events Dividends on 6% Preferred Stock ​ On June 13, 2023, the board of directors declared a quarterly cash dividend in the amount of $0.15 per share on the Company’s 6% Preferred Stock. The cash dividend was paid on August 1, 2023 to the holders of record of the 6% Preferred Stock as of the close of business on July 21, 2023. ​

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- Definition

The entire disclosure for significant events or transactions that occurred after the balance sheet date through the date the financial statements were issued or the date the financial statements were available to be issued. Examples include: the sale of a capital stock issue, purchase of a business, settlement of litigation, catastrophic loss, significant foreign exchange rate changes, loans to insiders or affiliates, and transactions not in the ordinary course of business.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 855
-Name Accounting Standards Codification
-Publisher FASB
-URI https://asc.fasb.org//855/tableOfContent

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 855
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483399/855-10-50-2

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