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Accumulated Other Comprehensive Income (Changes in Other Comprehensive Income by Components) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |
Beginning Balance | $ 1,045,478 | $ 999,877 |
Ending Balance | 1,085,975 | 1,045,478 | $ 999,877
Accumulated Other Comprehensive (Loss) Income |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |
Beginning Balance | (1,008) | (10,963) | (2,949)
Transfer of securities held-to-maturity to available-for-sale |  | (12,041) |
Other comprehensive income (loss) before reclassifications | 5,312 | 11,893 | (9,659)
Amounts reclassified out of accumulated other comprehensive (loss) income | 6,718 | 10,103 | 1,645
Other comprehensive income (loss) | 12,030 | 9,955 | (8,014)
Ending Balance | 11,022 | (1,008) | (10,963)
Net Unrealized Gains On Securities Available-For-Sale [Member] |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |
Beginning Balance | (441) | (10,972) | (2,638)
Transfer of securities held-to-maturity to available-for-sale |  | (12,041) |
Other comprehensive income (loss) before reclassifications | 7,803 | 14,335 | (8,104)
Amounts reclassified out of accumulated other comprehensive (loss) income | 4,730 | 8,237 | (230)
Other comprehensive income (loss) | 12,533 | 10,531 | (8,334)
Ending Balance | 12,092 | (441) | (10,972)
Net Unrealized Loss On Cash Flow Hedges [Member] |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |
Beginning Balance | (567) | 9 | (311)
Transfer of securities held-to-maturity to available-for-sale |  | 0 |
Other comprehensive income (loss) before reclassifications | (2,491) | (2,442) | (1,555)
Amounts reclassified out of accumulated other comprehensive (loss) income | 1,988 | 1,866 | 1,875
Other comprehensive income (loss) | (503) | (576) | 320
Ending Balance | $ (1,070) | $ (567) | $ 9

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- Definition Amount after tax, before reclassification adjustments of other comprehensive income (loss). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 30 -Section 45 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=118261656&loc=d3e32136-110900 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 30 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6450520&loc=d3e32583-110901 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=121641772&loc=SL7669686-108580 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 55 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=121640130&loc=d3e1436-108581 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 30 -Section 45 -Paragraph 20 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118261656&loc=d3e32211-110900 + Details
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