| **Income Taxes (Tables)**                         | 12 Months Ended                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        |
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| **Income Tax Disclosure [Abstract]**              |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |
| Components of Income Tax Expense                  | The components of income tax expense for the years ended December 31 are as follows: (dollars in thousands) 2012 2011 2010Current:      Federal $— $— $(105)State — — (22)Total current taxes — — (127)Deferred      Federal (13,709) (43,001) (36,996)State (2,721) (8,657) (7,544)Total deferred taxes (16,430) (51,658) (44,540)Increase in valuation allowance 15,391 52,299 45,926Total income tax (benefit)/expense - continuing operations $(1,039) $641 $1,259                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                |
| Effective Income Tax Rate Reconciliation          | A reconciliation of income tax expense computed at the statutory federal income tax rate to actual income tax expense is presented in the following table as of December 31: (dollars in thousands)        2012 2011 2010Amount of tax computed using Federal statutory tax rate of 35% in all years $(14,365) $(45,807) $(38,589)Increases/(decreases) resulting from effects of:      Non-taxable income (169) (196) (418)State income taxes, net of federal benefit (1,768) (5,627) (4,919)Valuation allowance on deferred tax assets 15,391 52,299 45,926Other (128) (28) (741)Total income tax (benefit)/expense - continuing operations $(1,039) $641 $1,259                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 |
| Components of Deferred Tax Assets and Liabilities | The components of deferred tax assets and liabilities and the tax effect of each are as follows: (dollars in thousands) December 31, 2012 December 31, 2011Deferred tax assets:    Allowance for loan losses $11,754 $17,395Net operating loss 145,472 119,446Compensation and benefit plans 805 2,098Fair value basis on securities 1,199 1,392Fair value basis of loans 9,742 12,099Fair value basis on deposits 187 859Pension and other post-retirement benefits 2,754 2,017Other real estate owned 16,650 16,904Gross unrealized securities losses 838 446Interest on non-performing loans 1,382 1,382Other 811 1,759Subtotal deferred tax assets 191,594 175,797Less: Valuation allowance (182,402) (167,011)Total deferred tax assets 9,192 8,786Deferred tax liabilities:    Core deposit intangible 2,673 3,229Depreciable basis of premises and equipment 721 1,151Net deferred loan fees and costs 1,010 871Gross unrealized securities gains 3,220 631SAB 109 valuation 2 6Other 728 1,096Total deferred tax liabilities 8,354 6,984Net deferred tax assets $838 $1,802 |

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| - Definition
Tabular disclosure of the components of income tax expense attributable to continuing operations for each year presented including, but not limited to: current tax expense (benefit), deferred tax expense (benefit), investment tax credits, government grants, the benefits of operating loss carryforwards, tax expense that results from allocating certain tax benefits either directly to contributed capital or to reduce goodwill or other noncurrent intangible assets of an acquired entity, adjustments of a deferred tax liability or asset for enacted changes in tax laws or rates or a change in the tax status of the entity, and adjustments of the beginning-of-the-year balances of a valuation allowance because of a change in circumstances that causes a change in judgment about the realizability of the related deferred tax asset in future years.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32639-109319
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| - Definition
Tabular disclosure of the components of net deferred tax asset or liability recognized in an entity's statement of financial position, including the following: the total of all deferred tax liabilities, the total of all deferred tax assets, the total valuation allowance recognized for deferred tax assets.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32537-109319
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| - Definition
Tabular disclosure of the reconciliation using percentage or dollar amounts of the reported amount of income tax expense attributable to continuing operations for the year to the amount of income tax expense that would result from applying domestic federal statutory tax rates to pretax income from continuing operations.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32687-109319
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