Securities - (Details 3) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Amortized Cost
Due within one year	$ 14,742
Due after one year through five years	107,452
Due after five years through ten years	128,319
Due after ten years	97,464
Amortized Cost	347,977	$ 356,282
Fair Value
Due within one year	14,860
Due after one year through five years	110,966
Due after five years through ten years	130,878
Due after ten years	100,512
Fair Value	357,216	362,893
Amortized Cost
Due within one year	0
Due after one year through five years	2,060
Due after five years through ten years	2,043
Due after ten years	22,646
Amortized Cost	704,305	686,405
Fair Value
Due within one year	0
Due after one year through five years	2,148
Due after five years through ten years	2,071
Due after ten years	17,823
Securities available for sale	696,885	674,248
Residential mortgage-backed securities
Amortized Cost
Available for sale debt securities	2,946
Other debt securities
Amortized Cost
Other debt securities, amortized cost	20,399
Amortized Cost	22,442	22,053
Fair Value
Other debt securities, fair value	20,586
Securities available for sale	22,656	22,145
Government agency mortgage backed securities \| Residential mortgage-backed securities
Amortized Cost
Available for sale debt securities	412,710
Amortized Cost	412,710	414,019
Fair Value
Securities available for sale	411,255	409,317
Government agency mortgage backed securities \| Commercial mortgage-backed securities
Amortized Cost
Available for sale debt securities	50,397
Amortized Cost	50,397	50,628
Fair Value
Securities available for sale	50,872	50,863
Government agency collateralized mortgage obligations \| Residential mortgage-backed securities
Amortized Cost
Available for sale debt securities	192,294
Amortized Cost	192,294	171,362
Fair Value
Securities available for sale	190,386	168,826
Government agency collateralized mortgage obligations \| Commercial mortgage-backed securities
Amortized Cost
Available for sale debt securities	1,756
Amortized Cost	1,756	2,528
Fair Value
Securities available for sale	$ 1,744	$ 2,550

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.

Name:	us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

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
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 5
-Subparagraph (aa)
-URI http://asc.fasb.org/extlink&oid=73527792&loc=d3e27232-111563

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