Securities (Details 1) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Amortized cost and fair value of securities available for sale
Amortized Cost, Available for Sale	$ 410,535	$ 357,633
Gross Unrealized Gains, Available for Sale	7,114	12,713
Gross Unrealized Losses, Available for Sale	(19,459)	(14,035)
Fair Value, Available for Sale	398,190	356,311
Trust preferred securities [Member]
Amortized cost and fair value of securities available for sale
Amortized Cost, Available for Sale	27,711	28,612
Gross Unrealized Gains, Available for Sale	0	0
Gross Unrealized Losses, Available for Sale	(11,751)	(13,544)
Fair Value, Available for Sale	15,960	15,068
Other debt securities [Member]
Amortized cost and fair value of securities available for sale
Amortized Cost, Available for Sale	20,834	22,079
Gross Unrealized Gains, Available for Sale	539	852
Gross Unrealized Losses, Available for Sale	(93)	(1)
Fair Value, Available for Sale	21,280	22,930
Other equity securities [Member]
Amortized cost and fair value of securities available for sale
Amortized Cost, Available for Sale	2,775	2,355
Gross Unrealized Gains, Available for Sale	966	713
Gross Unrealized Losses, Available for Sale	0	0
Fair Value, Available for Sale	3,741	3,068
Obligations of other U.S. Government agencies and corporations [Member]
Amortized cost and fair value of securities available for sale
Amortized Cost, Available for Sale	6,157	2,169
Gross Unrealized Gains, Available for Sale	156	273
Gross Unrealized Losses, Available for Sale	(193)	0
Fair Value, Available for Sale	6,120	2,442
Government agency mortgage backed securities [Member] \| Residential mortgage backed securities [Member]
Amortized cost and fair value of securities available for sale
Amortized Cost, Available for Sale	173,460	139,699
Gross Unrealized Gains, Available for Sale	2,442	5,209
Gross Unrealized Losses, Available for Sale	(4,000)	(91)
Fair Value, Available for Sale	171,902	144,817
Government agency mortgage backed securities [Member] \| Commercial mortgage backed securities [Member]
Amortized cost and fair value of securities available for sale
Amortized Cost, Available for Sale	41,621	41,981
Gross Unrealized Gains, Available for Sale	1,605	3,077
Gross Unrealized Losses, Available for Sale	(473)	0
Fair Value, Available for Sale	42,753	45,058
Government agency collateralized mortgage obligations [Member] \| Residential mortgage backed securities [Member]
Amortized cost and fair value of securities available for sale
Amortized Cost, Available for Sale	132,927	115,647
Gross Unrealized Gains, Available for Sale	1,378	2,273
Gross Unrealized Losses, Available for Sale	(2,949)	(399)
Fair Value, Available for Sale	131,356	117,521
Government agency collateralized mortgage obligations [Member] \| Commercial mortgage backed securities [Member]
Amortized cost and fair value of securities available for sale
Amortized Cost, Available for Sale	5,050	5,091
Gross Unrealized Gains, Available for Sale	28	316
Gross Unrealized Losses, Available for Sale	0	0
Fair Value, Available for Sale	$ 5,078	$ 5,407

This item represents the cost of debt and equity securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any.

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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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- Definition

This item represents the gross unrealized gains for securities, at a point in time, which are categorized neither as held-to-maturity nor trading securities.

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