SBM ACQUISITION - Schedule of Assets Aquired and Liabilities Assumed (Details) - USD ($)		6 Months Ended
	Oct. 16, 2015	Jun. 30, 2016	Dec. 31, 2015
Business Acquisition [Line Items]
Business Combination Provisional Information Initial Accounting Incomplete Adjustment Impact on Earnings		$ 0
Goodwill		94,697,000	$ 95,657,000
SBM Financial, Inc. [Member]
Business Acquisition [Line Items]
Cash	$ 26,125,000
Business Acquisition, Equity Interest Issued or Issuable, Value Assigned	108,561,000
Total consideration paid	136,676,000
Loans and loans held for sale	628,030,000
Cash and due from banks	86,042,000
Investments	39,742,000
Deferred tax assets	25,782,000
Premises and equipment	23,944,000
OREO	729,000
Core deposit intangible assets	6,608,000
Other assets	5,408,000
Deposits and borrowings	721,186,000
Other liabilities	8,314,000
Total identified assets acquired and liabilities assumed, at fair value	86,785,000
Goodwill	49,891,000
Predecessor [Member] | SBM Financial, Inc. [Member]
Business Acquisition [Line Items]
Loans and loans held for sale	639,390,000
Cash and due from banks	86,042,000
Investments	39,716,000
Deferred tax assets	26,293,000
Premises and equipment	16,851,000
OREO	2,530,000
Core deposit intangible assets	0
Other assets	5,421,000
Deposits and borrowings	719,640,000
Other liabilities	8,512,000
Total identified assets acquired and liabilities assumed, at fair value	88,091,000
Scenario, Adjustment [Member] | SBM Financial, Inc. [Member]
Business Acquisition [Line Items]
Loans and loans held for sale		137,000
Cash and due from banks		0
Investments		0
Deferred tax assets		666,000
Premises and equipment		0
OREO		0
Core deposit intangible assets		0
Other assets		157,000
Deposits and borrowings		0
Other liabilities		0
Total identified assets acquired and liabilities assumed, at fair value		960,000
Nonqualified Stock Options [Member] | SBM Financial, Inc. [Member]
Business Acquisition [Line Items]
Business Acquisition, Equity Interest Issued or Issuable, Value Assigned	1,990,000
Estimate of Fair Value Measurement [Member]
Business Acquisition [Line Items]
Loans and loans held for sale		$ 10,400,000	$ 13,100,000
Estimate of Fair Value Measurement [Member] | SBM Financial, Inc. [Member]
Business Acquisition [Line Items]
Loans and loans held for sale	(11,497,000)
Cash and due from banks	0
Investments	26,000
Deferred tax assets	(1,177,000)
Premises and equipment	7,093,000
OREO	(1,801,000)
Core deposit intangible assets	6,608,000
Other assets	(170,000)
Deposits and borrowings	1,546,000
Other liabilities	(198,000)
Total identified assets acquired and liabilities assumed, at fair value	$ (2,266,000)