Securities - Amortized Cost and Estimated Fair Value of Securities - Securities Held-to-maturity (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Securities held-to-maturity:
Amortized Cost	$ 210,170	$ 109,311
Gross Unrealized Gains	4,504	1,541
Gross Unrealized Losses	(50)	(1,031)
Securities held-to-maturity	214,624	109,821
Agency mortgage-backed securities
Securities held-to-maturity:
Amortized Cost	118,779	15,793
Gross Unrealized Gains	1,262	24
Gross Unrealized Losses	(9)	(168)
Securities held-to-maturity	120,032	15,649
Municipals - exempt from Federal tax
Securities held-to-maturity:
Amortized Cost	91,391	93,518
Gross Unrealized Gains	3,242	1,517
Gross Unrealized Losses	(41)	(863)
Securities held-to-maturity	$ 94,592	$ 94,172

Amount of accumulated unrealized gain on investments in debt securities classified as held-to-maturity.

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- Definition

Amount of accumulated unrealized loss on investments in debt securities classified as held-to-maturity.

+ References

+ Details

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- Definition

Amount before other than temporary impairment (OTTI) accretion, of investments in debt securities classified as held-to-maturity.

+ References

No definition available.

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- Definition

Fair value of investments in debt securities classified as held-to-maturity.

+ References

Reference 1: 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=27724398&loc=d3e27232-111563

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 5
-Subparagraph (f)
-URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27232-111563

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 5
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27232-111563

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