SECURITIES - Amortized Cost and Fair Value of Securities by Contractual Maturity (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Schedule of Held-to-maturity Securities [Line Items]
Held for Investment, Amortized Cost, Due in less than one year	$ 0
Held for Investment, Fair Value, Due in less than one year	0
Available for Sale Amortized Cost, Due in less than one year	0
Available for Sale, Fair Value, Due in less than one year	0
Held for Investment, Amortized Cost, Due after one year through five years	0
Held for Investment, Fair Value, Due after one year through five years	0
Available for Sale, Amortized Cost, Due after one year through five years	541
Available for Sale, Fair Value, Due after one year through five years	550
Held for Investment, Amortized Cost, Due after five years through ten years	0
Held for Investment, Fair Value, Due after five years through ten years	0
Available for Sale, Amortized Cost, Due after five years through ten years	8,054
Available for Sale, Fair Value, Due after five years through ten years	7,945
Held for Investment, Amortized Cost, Due after ten years	0
Held for Investment, Fair Value, Due after ten years	0
Available for Sale, Amortized Cost, Due after ten years	29,930
Available for Sale, Fair Value, Due after ten years	30,138
Held for Investment, Amortized Cost, Total	156,498	0
Held for Investment, Fair Value, Total	155,935
Available for Sale, Amortized Cost, Total	521,305	658,458
Available for Sale, Fair Value, Total	38,633
Gross Amortized Cost, Held for Investment Securities	156,498
Fair value, Held for Investment Securities	155,935
Gross Amortized Cost, Available for Sale	521,305	658,458
Fair Value, Available for Sale	518,353
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Schedule of Held-to-maturity Securities [Line Items]
Available for Sale, Amortized Cost, Total	104,837	129,468
Gross Amortized Cost, Held for Investment Securities	46,764
Fair value, Held for Investment Securities	46,933
Gross Amortized Cost, Available for Sale	104,837	129,468
Fair Value, Available for Sale	106,517
Collateralized Mortgage Obligations Of Us Government Sponsored Entities [Member]
Schedule of Held-to-maturity Securities [Line Items]
Available for Sale, Amortized Cost, Total	272,160	383,392
Gross Amortized Cost, Held for Investment Securities	109,734
Fair value, Held for Investment Securities	109,002
Gross Amortized Cost, Available for Sale	272,160	383,392
Fair Value, Available for Sale	266,359
Private mortgage backed securities [Member]
Schedule of Held-to-maturity Securities [Line Items]
Available for Sale, Amortized Cost, Total	29,876	29,800
Gross Amortized Cost, Held for Investment Securities	0
Fair value, Held for Investment Securities	0
Gross Amortized Cost, Available for Sale	29,876	29,800
Fair Value, Available for Sale	30,152
Private collateralized mortgage obligations [Member]
Schedule of Held-to-maturity Securities [Line Items]
Available for Sale, Amortized Cost, Total	75,907	76,520
Gross Amortized Cost, Held for Investment Securities	0
Fair value, Held for Investment Securities	0
Gross Amortized Cost, Available for Sale	75,907	76,520
Fair Value, Available for Sale	76,692
No Contractual Maturity [Member]
Schedule of Held-to-maturity Securities [Line Items]
Available for Sale, Amortized Cost, Total	0
Gross Amortized Cost, Held for Investment Securities	0
Fair value, Held for Investment Securities	0
Gross Amortized Cost, Available for Sale	0
Fair Value, Available for Sale	$ 0