EMPLOYEE AND DIRECTOR BENEFIT PLANS- Summary of the Company’s Option Plans (Details) (USD $)	3 Months Ended	12 Months Ended
	Mar. 31, 2014	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options acquired		73,413
Weighted average exercise price, options acquired		$ 32.25
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Options, Outstanding, Period Start (in shares)	46,744	46,744
Granted/vested (in shares)		0
Yadkin options assumed in Mergers (in shares)		50,693
Exercised (in shares)		11,353
Expired (in shares)		3,360
Forfeited (in shares)		4,257
Options, Outstanding, Period End (in shares)		78,467	46,744
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]
Options, Outstanding, Period Start, Weighted Average Option Price (in dollars per share)	$ 17.79	$ 17.79
Yadkin options assumed in Mergers (in dollars per share)		$ 31.03
Exercised (in dollars per share)		$ 12.56
Expired (in dollars per share)		$ 15.94
Forfeited (in dollars per share)		$ 32.01
Options, Outstanding, Period End, Weighted Average Option Price (in dollars per share)		$ 31.06	$ 17.79
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable [Roll Forward]
Options, Exercisable, Period Start (in shares)	46,744	46,744
Yadkin options assumed in Mergers (in shares)		50,693
Exercised (in shares)		11,353
Expired (in shares)		3,360
Forfeited (in shares)		4,257
Options, Exercisable, Period End (in shares)		78,467	46,744
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price [Roll Forward]
Exercisable, Weighted Average Option Price, Period Start (in dollars per share)	$ 17.79	$ 17.79
Yadkin options assumed in Mergers (in dollars per share)		$ 31.03
Exercised (in dollars per share)		$ 12.56
Expired (in dollars per share)		$ 15.94
Forfeited (in dollars per share)		$ 32.01
Exercisable, Weighted Average Option Price, Period End (in dollars per share)		$ 31.06	$ 17.79
Weighted average remaining life of options exercisable (in years)	1 year 8 months 19 days		1 year 6 months 18 days
Weighted average remaining life of options outstanding (in years)	1 year 8 months 19 days		1 year 6 months 18 days
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price [Roll Forward]
Compensation cost charged to earnings related to stock options		$ 0	$ 0	$ 2,000
Aggregate intrinsic value of total options outstanding		125,000
Compensation not yet recognized, stock options		$ 0
2008 Omnibus Stock Ownership and Long Term Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares available for grant		9,621
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Granted/vested (in shares)		5,054
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price [Roll Forward]
Exercisable, Weighted Average Option Price, Period End (in dollars per share)		$ 13.77
2013 Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares available for grant		300,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Granted/vested (in shares)		0