Borrowed Funds - Short-term Borrowings and Repurchase Agreements (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
Jun. 30, 2020	Dec. 31, 2019
Short-term Borrowings from FHLB
Short-term Borrowings and Repurchase Agreements
Balance at end of period	$ 0	$ 192,063
Average balance during the period	63,635	187,226
Maximum month-end balance	$ 154,248	$ 240,811
Weighted-average rate during the period	0.23%	2.24%
Weighted-average rate at end of period	0.39%	1.81%
Investment Securities
Short-term Borrowings and Repurchase Agreements
Investment securities held as collateral	$ 10,000	$ 10,500
Repurchase Agreements
Short-term Borrowings and Repurchase Agreements
Balance at end of period	9,815	10,172
Average balance during the period	9,682	11,252
Maximum month-end balance	$ 9,815	$ 14,655
Weighted-average rate during the period	0.17%	0.43%
Weighted-average rate at end of period	0.06%	0.44%

The average effective interest rate during the reporting period.

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The carrying amount (fair value) as of the balance sheet date of securities held that had been pledged by counterparties under financing and lending arrangements, pursuant to which the entity has the right by agreement or custom to sell or re-pledge such securities.

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Reflects the total carrying amount as of the balance sheet date of debt having initial terms less than one year or the normal operating cycle, if longer.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Weighted average interest rate of short-term debt outstanding calculated at point in time.

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For the form of debt having an initial term of less than one year or less than the normal operating cycle, if longer, average borrowings during the period.

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For the form of debt having an initial term of less than one year or less than the normal operating cycle, if longer, maximum month-end borrowings during the period.

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