Treasury Stock - Repurchased Shares of Common Stock (Details) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2021	Sep. 30, 2020
Equity [Abstract]
Shares repurchased (in shares)							859	263
Cost of shares repurchased	$ 17,533	$ 15,733	$ 10,951	$ 3,417	$ 114	$ 6,291	$ 44,217	$ 9,822

Equity impact of the cost of common and preferred stock that were repurchased during the period. Recorded using the cost method.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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