Fair Values of Assets and Liabilities (Measured on Recurring Basis) (Details) (Continuing operations [Member], USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Loans held for sale	$ 1,324	$ 4,529
Available-for-sale investment securities	477,136	431,306
Recurring [Member] \| Total [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Loans held for sale	1,324
Available-for-sale investment securities	477,136	431,306
Mortgage servicing rights	25
Total assets at fair value	477,161	431,306
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	7,096	7,188
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	3,616	32,364
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	6,066	6,090
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	385,502	350,273
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	32,680	32,217
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	5,339
Recurring [Member] \| Total [Member] \| Corporate notes [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Available-for-sale investment securities	36,837	3,174
Recurring [Member] \| Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Loans held for sale	1,324
Available-for-sale investment securities	477,136	431,306
Total assets at fair value	477,136	431,306
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	7,096	7,188
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	3,616	32,364
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	6,066	6,090
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	385,502	350,273
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	32,680	32,217
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	5,339
Recurring [Member] \| Level 2 [Member] \| Corporate notes [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Available-for-sale investment securities	36,837	3,174
Recurring [Member] \| Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Mortgage servicing rights	25
Total assets at fair value	$ 25

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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