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SECURITIES - Amortized Cost and Estimated Fair Value by Contractual Maturity (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Available for sale, Amortized Cost
Within 1 year	$ 0
Over 1 year to 5 years	25,697
Over 5 years to 10 years	48,637
Over 10 years	122,453
Total bonds and obligations	196,787
Marketable equity securities	47,858	$ 30,522
Mortgage-backed securities	948,661
Available-for-sale securities, amortized cost basis	1,193,306	1,149,094
Available for sale, Fair Value
Within 1 year	0
Over 1 year to 5 years	26,042
Over 5 years to 10 years	49,397
Over 10 years	123,428
Total bonds and obligations	198,867
Marketable equity securities	65,541	33,967
Mortgage-backed securities	945,129
Available-for-securities	1,209,537	1,154,457
Held to maturity, Amortized Cost
Within 1 year	1,803
Over 1 year to 5 years	19,674
Over 5 years to 10 years	17,502
Over 10 years	200,087
Total bonds and obligations	239,066
Mortgage-backed securities	95,302
Held-to-maturity securities	334,368	131,652
Held to maturity, Fair Value
Within 1 year	1,806
Over 1 year to 5 years	20,494
Over 5 years to 10 years	17,968
Over 10 years	201,917
Total bonds and obligations	242,185
Mortgage-backed securities	95,495
Held-to-maturity securities	$ 337,680	$ 136,904

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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=73527792&loc=d3e27232-111563

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