The number of securities classified as temporary equity that have been sold (or granted) to the entity's shareholders. Securities issued include securities outstanding and securities held in treasury. Temporary equity is a security with redemption features that are outside the control of the issuer, is not classified as an asset or liability in conformity with GAAP, and is not mandatorily redeemable. Includes any type of security that is redeemable at a fixed or determinable price or on a fixed or determinable date or dates, is redeemable at the option of the holder, or has conditions for redemption which are not solely within the control of the issuer. If convertible, the issuer does not control the actions or events necessary to issue the maximum number of shares that could be required to be delivered under the conversion option if the holder exercises the option to convert the stock to another class of equity. If the security is a warrant or a rights issue, the warrant or rights issue is considered to be temporary equity if the issuer cannot demonstrate that it would be able to deliver upon the exercise of the option by the holder in all cases. Includes stock with put option held by ESOP and stock redeemable by holder only in the event of a change in control of the issuer.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(27)(b))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Name:	us-gaap_TemporaryEquitySharesIssued
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

Preferred Units - Narrative (Details) - $ / shares							3 Months Ended	12 Months Ended
Preferred Units - Narrative (Details) - $ / shares	Apr. 16, 2020	Feb. 07, 2020	Nov. 08, 2019	Aug. 09, 2019	May 10, 2019	Feb. 08, 2019	Mar. 31, 2020	Dec. 31, 2019
Preferred stock, dividend declared per share (USD per share)		$ 24.375	$ 24.375	$ 24.375	$ 24.375	$ 24.375		$ 97.500
Subsequent Event
Preferred stock, dividend declared per share (USD per share)	$ 24.375
Series A Preferred Units
Units issued (in shares)							500,000	500,000
Face value (USD per share)							$ 1,000	$ 1,000
Distribution per unit (in dollars per share)							$ 24.375