Securities - (Details 1) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Amortized cost and fair value of securities available for sale
Amortized Cost	$ 670,172	$ 647,658
Gross Unrealized Gains	11,993	8,692
Gross Unrealized Losses	(7,718)	(9,545)
Securities available for sale	674,447	646,805
Trust preferred securities
Amortized cost and fair value of securities available for sale
Amortized Cost	24,675	24,770
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(6,496)	(5,301)
Securities available for sale	18,179	19,469
Other debt securities
Amortized cost and fair value of securities available for sale
Amortized Cost	17,587	18,899
Gross Unrealized Gains	583	468
Gross Unrealized Losses	(9)	(34)
Securities available for sale	18,161	19,333
Other equity securities
Amortized cost and fair value of securities available for sale
Amortized Cost	0	2,500
Gross Unrealized Gains	0	1,840
Gross Unrealized Losses	0	0
Securities available for sale	0	4,340
Obligations of other U.S. Government agencies and corporations
Amortized cost and fair value of securities available for sale
Amortized Cost	2,080	6,093
Gross Unrealized Gains	140	126
Gross Unrealized Losses	0	(19)
Securities available for sale	2,220	6,200
Government agency mortgage backed securities \| Residential mortgage backed securities:
Amortized cost and fair value of securities available for sale
Amortized Cost	401,861	362,669
Gross Unrealized Gains	6,757	3,649
Gross Unrealized Losses	(314)	(1,778)
Securities available for sale	408,304	364,540
Government agency mortgage backed securities \| Commercial mortgage backed securities:
Amortized cost and fair value of securities available for sale
Amortized Cost	52,975	58,864
Gross Unrealized Gains	1,952	1,002
Gross Unrealized Losses	(29)	(107)
Securities available for sale	54,898	59,759
Government agency collateralized mortgage obligations \| Residential mortgage backed securities:
Amortized cost and fair value of securities available for sale
Amortized Cost	166,616	168,916
Gross Unrealized Gains	2,301	1,449
Gross Unrealized Losses	(870)	(2,305)
Securities available for sale	168,047	168,060
Government agency collateralized mortgage obligations \| Commercial mortgage backed securities:
Amortized cost and fair value of securities available for sale
Amortized Cost	4,378	4,947
Gross Unrealized Gains	260	158
Gross Unrealized Losses	0	(1)
Securities available for sale	$ 4,638	$ 5,104

This item represents the cost of debt 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.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (aa)
-URI http://asc.fasb.org/extlink&oid=73527792&loc=d3e27161-111563

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.2)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 25
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=65884222&loc=d3e22054-111558

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-Section 50
-Paragraph 5
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-URI http://asc.fasb.org/extlink&oid=73527792&loc=d3e27232-111563

Reference 3: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=66010992&loc=d3e26610-111562

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