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Accumulated Other Comprehensive Income | 6 Months Ended
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Jun. 30, 2017
Equity [Abstract] |
Accumulated Other Comprehensive Income | Accumulated Other Comprehensive Income The following table presents changes in other comprehensive income:
| Before-Tax Amount |  | Tax Effect |  | Net of Tax Amount
| (in thousands)
Three months ended June 30, 2017 |  |  |  |  |
Unrealized gain on securities | $ | 15,798 |  |  | $ | (5,530 | ) |  | $ | 10,268 |
Reclassification adjustment for securities gains included in net income (1) | (1,436 | ) |  | 504 |  |  | (932 | )
Amortization of net unrecognized pension and postretirement items (3) | 522 |  |  | (181 | ) |  | 341 |
Total Other Comprehensive Income | $ | 14,884 |  |  | $ | (5,207 | ) |  | $ | 9,677 |
Three months ended June 30, 2016 |  |  |  |  |
Unrealized gain on securities | $ | 19,753 |  |  | $ | (6,914 | ) |  | $ | 12,839 |
Reclassification adjustment for securities gains included in net income (1) | (76 | ) |  | 27 |  |  | (49 | )
Amortization of unrealized loss on derivative financial instruments(2) | 6 |  |  | (2 | ) |  | 4 |
Amortization of net unrecognized pension and postretirement items (3) | 49 |  |  | (17 | ) |  | 32 |
Total Other Comprehensive Income | $ | 19,732 |  |  | $ | (6,906 | ) |  | $ | 12,826 |
Six months ended June 30, 2017 |  |  |  |  |
Unrealized gain on securities | $ | 22,374 |  |  | $ | (7,833 | ) |  | $ | 14,541 |
Reclassification adjustment for securities gains included in net income (1) | (2,542 | ) |  | 891 |  |  | (1,651 | )
Amortization of net unrecognized pension and postretirement items (3) | 1,051 |  |  | (367 | ) |  | 684 |
Total Other Comprehensive Income | $ | 20,883 |  |  | $ | (7,309 | ) |  | $ | 13,574 |
Six months ended June 30, 2016 |  |  |  |  |
Unrealized gain on securities | $ | 45,946 |  |  | $ | (16,081 | ) |  | $ | 29,865 |
Reclassification adjustment for securities gains included in net income (1) | (1,023 | ) |  | 358 |  |  | (665 | )
Amortization of unrealized loss on derivative financial instruments (2) | 12 |  |  | (4 | ) |  | 8 |
Amortization of net unrecognized pension and postretirement items (3) | 766 |  |  | (268 | ) |  | 498 |
Total Other Comprehensive Income | $ | 45,701 |  |  | $ | (15,995 | ) |  | $ | 29,706 |
(1) | Amounts reclassified out of accumulated other comprehensive income. Before-tax amounts included in "Investment securities gains, net" on the consolidated statements of income. See Note 4, "Investment Securities," for additional details.
(2) | Amounts reclassified out of accumulated other comprehensive income. Before-tax amounts included in "Interest expense" on the consolidated statements of income.
(3) | Amounts reclassified out of accumulated other comprehensive income. Before-tax amounts included in "Salaries and employee benefits" on the consolidated statements of income. See Note 8, "Employee Benefit Plans," for additional details.
The following table presents changes in each component of accumulated other comprehensive income (loss), net of tax:
| Unrealized Gains (Losses) on Investment Securities Not Other-Than-Temporarily Impaired |  | Unrealized Non-Credit Gains (Losses) on Other-Than-Temporarily Impaired Debt Securities |  | Unrealized Effective Portions of Losses on Forward-Starting Interest Rate Swaps |  | Unrecognized Pension and Postretirement Plan Income (Costs) |  | Total
| (in thousands)
Three months ended June 30, 2017 |  |  |  |  |  |  |  |  |
Balance at March 31, 2017 | $ | (19,493 | ) |  | $ | 273 |  |  | $ | — |  |  | $ | (15,332 | ) |  | $ | (34,552 | )
Other comprehensive income before reclassifications | 10,268 |  |  | — |  |  | — |  |  | — |  |  | 10,268 |
Amounts reclassified from accumulated other comprehensive income (loss) | (932 | ) |  | — |  |  | — |  |  | 341 |  |  | (591 | )
Balance at June 30, 2017 | $ | (10,157 | ) |  | $ | 273 |  |  | $ | — |  |  | $ | (14,991 | ) |  | $ | (24,875 | )
Three months ended June 30, 2016 |  |  |  |  |  |  |  |  |
Balance at March 31, 2016 | $ | 9,911 |  |  | $ | 458 |  |  | $ | (11 | ) |  | $ | (15,495 | ) |  | $ | (5,137 | )
Other comprehensive income before reclassifications | 12,839 |  |  | — |  |  | — |  |  | — |  |  | 12,839 |
Amounts reclassified from accumulated other comprehensive income (loss) | (49 | ) |  | — |  |  | 4 |  |  | 32 |  |  | (13 | )
Balance at June 30, 2016 | $ | 22,701 |  |  | $ | 458 |  |  | $ | (7 | ) |  | $ | (15,463 | ) |  | $ | 7,689 |
Six months ended June 30, 2017 |  |  |  |  |  |  |  |  |
Balance at December 31, 2016 | $ | (23,047 | ) |  | $ | 273 |  |  | $ | — |  |  | $ | (15,675 | ) |  | $ | (38,449 | )
Other comprehensive income before reclassifications | 14,541 |  |  | — |  |  | — |  |  | — |  |  | 14,541 |
Amounts reclassified from accumulated other comprehensive income (loss) | (1,651 | ) |  | — |  |  | — |  |  | 684 |  |  | (967 | )
Balance at June 30, 2017 | $ | (10,157 | ) |  | $ | 273 |  |  | $ | — |  |  | $ | (14,991 | ) |  | $ | (24,875 | )
Six months ended June 30, 2016 |  |  |  |  |  |  |  |  |
Balance at December 31, 2015 | $ | (6,499 | ) |  | $ | 458 |  |  | $ | (15 | ) |  | $ | (15,961 | ) |  | $ | (22,017 | )
Other comprehensive income before reclassifications | 29,865 |  |  | — |  |  | — |  |  | — |  |  | 29,865 |
Amounts reclassified from accumulated other comprehensive income (loss) | (665 | ) |  | — |  |  | 8 |  |  | 498 |  |  | (159 | )
Balance at June 30, 2016 | $ | 22,701 |  |  | $ | 458 |  |  | $ | (7 | ) |  | $ | (15,463 | ) |  | $ | 7,689 |

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- Definition The entire disclosure for comprehensive income, which includes, but is not limited to, 1) the amount of income tax expense or benefit allocated to each component of other comprehensive income, including reclassification adjustments, 2) the reclassification adjustments for each classification of other comprehensive income and 3) the ending accumulated balances for each component of comprehensive income. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=66004124&loc=d3e689-108580 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=66004124&loc=SL7669619-108580 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=66004124&loc=d3e640-108580 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=66004124&loc=d3e716-108580 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 16 -URI http://asc.fasb.org/extlink&oid=66004124&loc=d3e709-108580 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=66004124&loc=d3e637-108580 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14 -URI http://asc.fasb.org/extlink&oid=66004124&loc=d3e681-108580 Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Reclassification Adjustments -URI http://asc.fasb.org/extlink&oid=6522872 + Details
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