Securities (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Securities available for sale
Amortized Cost	$ 738,857	$ 712,637
Unrealized Gains	25,932	28,181
Unrealized Losses	(3,844)	(3,507)
Fair Value	760,945	737,311
U.S. Treasury [Member]
Securities available for sale
Amortized Cost	2,013	4,018
Unrealized Gains	12	18
Unrealized Losses	0	0
Fair Value	2,025	4,036
U.S. Gov't sponsored entities [Member]
Securities available for sale
Amortized Cost	187,548	157,965
Unrealized Gains	5,615	5,977
Unrealized Losses	(393)	(161)
Fair Value	192,770	163,781
State & political subdivisions [Member]
Securities available for sale
Amortized Cost	174,115	170,223
Unrealized Gains	10,198	11,113
Unrealized Losses	(159)	(57)
Fair Value	184,154	181,279
Residential & multi-family mortgage [Member]
Securities available for sale
Amortized Cost	289,153	308,800
Unrealized Gains	7,932	8,724
Unrealized Losses	(780)	(702)
Fair Value	296,305	316,822
Commercial mortgage [Member]
Securities available for sale
Amortized Cost	1,267	1,275
Unrealized Gains	0	29
Unrealized Losses	(3)	0
Fair Value	1,264	1,304
Corporate notes & bonds [Member]
Securities available for sale
Amortized Cost	17,371	17,368
Unrealized Gains	93	26
Unrealized Losses	(2,128)	(2,370)
Fair Value	15,336	15,024
Pooled trust preferred [Member]
Securities available for sale
Amortized Cost	800	800
Unrealized Gains	0	0
Unrealized Losses	(242)	(200)
Fair Value	558	600
Pooled SBA [Member]
Securities available for sale
Amortized Cost	65,069	50,667
Unrealized Gains	2,071	2,277
Unrealized Losses	(139)	(17)
Fair Value	67,001	52,927
Other securities [Member]
Securities available for sale
Amortized Cost	1,521	1,521
Unrealized Gains	11	17
Unrealized Losses	0	0
Fair Value	$ 1,532	$ 1,538

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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