Securities Equity Securities (Details) (Details) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended
	Jun. 30, 2020		Jun. 30, 2019	Jun. 30, 2020		Jun. 30, 2019	Mar. 31, 2020	Dec. 31, 2019	Mar. 31, 2019	Dec. 31, 2018
Investments, Debt and Equity Securities [Abstract]
Gains recognized during the period on equity securities	$ 16,425	[1],[2]	$ 0	$ 16,425	[1],[2]	$ 0
Less: Gains recognized during the period on equity securities sold during the period	(3,000)	[2]	0	(3,000)	[2]	0
Unrealized gains recognized during the reporting period on equity securities still held at the reporting date	$ 13,425	[2]	0	$ 13,425	[2]	0
Visa Class B shares, shares sold	17,360
Visa Class B shares, gain on sale	$ 3,000
Visa Class B shares, remaining shares	77,683			77,683
Equity Securities	$ 13,425		$ 0	$ 13,425		$ 0	$ 0	$ 0	$ 0	$ 0

[1] Other securities gains includes gain from sale of Visa Class B restricted stock and subsequent write up to fair value of remaining Visa Class B shares.

[2] Visa Class B restricted stock owned by the Company was previously carried at a zero-cost basis due to existing transfer restrictions and uncertainty of covered litigation. The sale of shares by the Company of Visa Class B restricted shares during the three months ended June 30, 2020 resulted in an observable market price. As a result, the Company adjusted the carrying value of its remaining shares of Visa Class B restricted shares upward to this observable market price.