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Stockholders' Equity (Tables) | 6 Months Ended
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Jun. 30, 2016
Stockholders' Equity [Abstract] |
Components of Accumulated Other Comprehensive Income (Loss) |
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﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  | Available |  | HTM Securities |  |  |  | Loss on |  |  |
﻿ |  | for Sale |  | Transferred |  | Employee |  | Effective Cash |  |  |
﻿(in thousands) |  | Securities |  | from AFS |  | Benefit Plans |  | Flow Hedges |  | Total
﻿Balance, December 31, 2014 |  | $ | 18,001 |  | $ | (19,074) |  | $ | (48,626) |  | $ | (375) |  | $ | (50,074)
﻿Other comprehensive income before income taxes: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿Net change in unrealized (loss) gain |  |  | (13,962) |  |  | — |  |  | — |  |  | 1,005 |  |  | (12,957)
﻿Reclassification of net (gain) losses realized and included in earnings |  |  | (165) |  |  | — |  |  | 1,571 |  |  | — |  |  | 1,406
﻿Valuation adjustment for employee benefit plans |  |  | — |  |  | — |  |  | (5,922) |  |  | — |  |  | (5,922)
﻿Amortization of unrealized net loss on securities transferred to HTM |  |  | — |  |  | 1,586 |  |  | — |  |  | — |  |  | 1,586
﻿Income tax (benefit) expense |  |  | (5,249) |  |  | 580 |  |  | (1,574) |  |  | 366 |  |  | (5,877)
﻿Balance, June 30, 2015 |  | $ | 9,123 |  | $ | (18,068) |  | $ | (51,403) |  | $ | 264 |  | $ | (60,084)
﻿Balance, December 31, 2015 |  | $ | 4,268 |  | $ | (16,795) |  | $ | (67,890) |  | $ | (178) |  | $ | (80,595)
﻿Other comprehensive income before income taxes: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿Net change in unrealized gain |  |  | 41,990 |  |  | — |  |  | — |  |  | 3,611 |  |  | 45,601
﻿Reclassification of net (gain) losses realized and included in earnings |  |  | (1,114) |  |  | — |  |  | 2,916 |  |  | — |  |  | 1,802
﻿Amortization of unrealized net loss on securities transferred to HTM |  |  | — |  |  | 1,628 |  |  | — |  |  | — |  |  | 1,628
﻿Income tax expense |  |  | 14,970 |  |  | 625 |  |  | 1,066 |  |  | 1,316 |  |  | 17,977
﻿Balance, June 30, 2016 |  | $ | 30,174 |  | $ | (15,792) |  | $ | (66,040) |  | $ | 2,117 |  | $ | (49,541)
﻿
Line Items in Consolidated Income Statements Affected by Amounts Reclassified from Accumulated Other Comprehensive Income |
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﻿ |  |  |  |  |  |  |  |
﻿ |  | Six Months Ended |  |
﻿ |  |  |  |  |  |  |  |
﻿Amount reclassified from AOCI (a) |  | June 30, |  | Affected line item on
﻿ |  |  |  |  |  |  |  |
﻿(in thousands) |  |  | 2016 |  |  | 2015 |  | the income statement
﻿Gain on sale of AFS securities |  | $ | 1,114 |  | $ | 165 |  | Securities transactions
﻿Tax effect |  |  | (390) |  |  | (58) |  | Income taxes
﻿Net of tax |  |  | 724 |  |  | 107 |  | Net income
﻿Amortization of unrealized net loss on securities transferred to HTM |  |  | (1,628) |  |  | (1,586) |  | Interest income
﻿Tax effect |  |  | 625 |  |  | 580 |  | Income taxes
﻿Net of tax |  |  | (1,003) |  |  | (1,006) |  | Net income
﻿Amortization of defined benefit pension and post-retirement items |  |  | (2,916) |  |  | (1,571) |  | Employee benefits expense (b)
﻿Tax effect |  |  | 1,066 |  |  | 550 |  | Income taxes
﻿Net of tax |  |  | (1,850) |  |  | (1,021) |  | Net income
﻿Total reclassifications, net of tax |  | $ | (2,129) |  | $ | (1,920) |  | Net income
﻿
| (a) |  | Amounts in parenthesis indicate reduction in net income.
﻿
| (b) |  | These accumulated other comprehensive income components are included in the computation of net periodic pension and post-retirement cost that is reported with employee benefits expense (see Note 11 for additional details).

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- Definition Tabular disclosure of the components of accumulated other comprehensive income (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=36458714&loc=SL7669686-108580 + Details
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