Carrying value as of the balance sheet date of dividends declared but unpaid on equity securities issued by the entity and outstanding.

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The excess of (1) fair value of the consideration transferred to the holders of the preferred stock over (2) the carrying amount of the preferred stock in the registrant's balance sheet, during the accounting period.

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Number of stock bought back by the entity at the exercise price or redemption price.

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Shareholders' Equity - Preferred Shares (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands		12 Months Ended
	Feb. 10, 2017	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Net reduction to net income available for common shareholders		$ 0	$ 0	$ 9,893
Series D Preferred Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares redeemed (in shares)	11,600
Dividend rate percentage	7.125%
Liquidation preference (in dollars per share)	$ 25.00
Dividends payable	$ 291,435,000
Net reduction to net income available for common shareholders				$ 9,893