Fair Values of Assets and Liabilities (Measured on Recurring Basis) (Details) (Continuing operations [Member], USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Loans held for sale	$ 5,012	$ 6,974
Available-for-sale investment securities	492,355	564,850
Recurring [Member] \| Total [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Available-for-sale investment securities	492,355	564,850
Mortgage servicing rights	1,028	726
Total assets at fair value	493,383	565,576
Recurring [Member] \| Total [Member] \| U.S, Treasury and government agencies debt securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Available-for-sale investment securities		6,981
Recurring [Member] \| Total [Member] \| U.S. government sponsored agencies debt securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Available-for-sale investment securities	2,107	22,173
Recurring [Member] \| Total [Member] \| States and political subdivisions debt securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Available-for-sale investment securities		6,038
Recurring [Member] \| Total [Member] \| Residential mortgage-backed securities - GSE [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Available-for-sale investment securities	408,464	441,074
Recurring [Member] \| Total [Member] \| Residential mortgage-backed securities - private [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Available-for-sale investment securities	22,621	22,945
Recurring [Member] \| Total [Member] \| Commercial mortgage-backed securities - GSE [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Available-for-sale investment securities	22,396	23,359
Recurring [Member] \| Total [Member] \| Commercial mortgage-backed securities - private [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Available-for-sale investment securities		5,317
Recurring [Member] \| Total [Member] \| Corporate notes [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Available-for-sale investment securities	36,767	36,963
Recurring [Member] \| Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Available-for-sale investment securities	492,355	564,850
Total assets at fair value	492,355	564,850
Recurring [Member] \| Level 2 [Member] \| U.S, Treasury and government agencies debt securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Available-for-sale investment securities		6,981
Recurring [Member] \| Level 2 [Member] \| U.S. government sponsored agencies debt securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Available-for-sale investment securities	2,107	22,173
Recurring [Member] \| Level 2 [Member] \| States and political subdivisions debt securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Available-for-sale investment securities		6,038
Recurring [Member] \| Level 2 [Member] \| Residential mortgage-backed securities - GSE [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Available-for-sale investment securities	408,464	441,074
Recurring [Member] \| Level 2 [Member] \| Residential mortgage-backed securities - private [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Available-for-sale investment securities	22,621	22,945
Recurring [Member] \| Level 2 [Member] \| Commercial mortgage-backed securities - GSE [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Available-for-sale investment securities	22,396	23,359
Recurring [Member] \| Level 2 [Member] \| Commercial mortgage-backed securities - private [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Available-for-sale investment securities		5,317
Recurring [Member] \| Level 2 [Member] \| Corporate notes [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Available-for-sale investment securities	36,767	36,963
Recurring [Member] \| Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Mortgage servicing rights	1,028	726
Total assets at fair value	$ 1,028	$ 726

This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents Available-for-sale Securities which consist of all investments in certain debt and equity securities neither classified as trading or held-to-maturity securities. A debt security represents a creditor relationship with an enterprise. Debt securities include, among other items, US Treasury securities, US government securities, municipal securities, corporate bonds, convertible debt, commercial paper, and all securitized debt instruments. An equity security represents an ownership interest in an enterprise or the right to acquire or dispose of an ownership interest in an enterprise at fixed or determinable prices. Equity securities include, among other things, common stock, certain preferred stock, warrant rights, call options, and put options, but do not include convertible debt. An entity may opt to provide the reader with additional narrative text to better understand the nature of investments in debt and equity securities which are categorized as Available-for-sale.

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Fair value as of the balance sheet date of an asset representing net future revenues from contractually specified servicing fees, late charges, and other ancillary revenues, in excess of future costs related to servicing arrangements.

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