Common Stock and Other Equity Related Transactions - ATM Activity (Details) - USD ($) $ / shares in Units, $ in Thousands	9 Months Ended
Sep. 30, 2020	Sep. 30, 2019
Class of Stock
Commissions paid to sales agents	$ 612	$ 989
ATM \| Common Stock
Class of Stock
Issuance of common stock (in shares)		1,010,472
Weighted average price (in usd per share)		$ 58.71
Total gross proceeds		$ 59,319
Commissions paid to sales agents		$ 771

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Number of new stock issued during the period.

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