MERGERS AND ACQUISITIONS - Pro Forma Information (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
Mar. 31, 2015	Mar. 31, 2014
Business Combinations [Abstract]
Net interest income	$ 39,176	$ 39,085
Net income	10,250	8,952
Net income available to common stockholders	$ 9,611	$ 8,393
Basic income per common share	$ 0.30	$ 0.28
Diluted income per common share	$ 0.30	$ 0.27
Weighted average basic common shares outstanding (in shares)	31,606,909	30,484,994
Weighted average diluted common shares outstanding (in shares)	31,608,928	30,632,168

Business Acquisition, Pro Forma Net Income (Loss) Available to Common Stockholders

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- Definition

Business Acquisition, Pro Forma Net Interest Income

+ References

No definition available.

+ Details

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- Definition

The pro forma basic net income per share for a period as if the business combination or combinations had been completed at the beginning of a period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (h)(2)-(3)

-URI http://asc.fasb.org/extlink&oid=25497992&loc=d3e1392-128463

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- Definition

The pro forma diluted net income per share for a period as if the business combination or combinations had been completed at the beginning of a period.

+ References

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The pro forma net Income or Loss for the period as if the business combination or combinations had been completed at the beginning of a period.

+ References

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- Definition

The weighted average number of shares or units and dilutive common stock or unit equivalents outstanding in the calculation of proforma diluted earnings per share (earnings per unit), which is commonly presented in initial public offerings based on the terms of the offering.

+ References

No definition available.

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The weighted average number of shares (units) outstanding in the calculation of pro forma basic earnings per share (earnings per unit), which is commonly presented in initial public offerings based on the terms of the offering.

+ References

No definition available.

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