Parent Company Only Financial Statements - Condensed Statements of Comprehensive Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Condensed Statements of Comprehensive Income
NET INCOME	$ 15,439	$ 14,742	$ 12,610
OTHER COMPREHENSIVE INCOME BEFORE TAX:
Change in unrealized gain (loss) on securities available-for-sale	(992)	1,830	(3,220)
Total other comprehensive income (loss) before tax	(992)	1,830	(3,227)
DEFERRED TAX EXPENSE (BENEFIT) RELATED TO OTHER COMPREHENSIVE INCOME	(347)	641	(1,099)
OTHER COMPREHENSIVE INCOME, NET OF TAX	(645)	1,189	(2,128)
COMPREHENSIVE INCOME	14,794	15,931	10,482
Green Bancorp, Inc.
Condensed Statements of Comprehensive Income
NET INCOME	15,439	14,743	12,610
OTHER COMPREHENSIVE INCOME BEFORE TAX:
Change in unrealized gain (loss) on securities available-for-sale	(992)	1,830	(3,227)
Total other comprehensive income (loss) before tax	(992)	1,830	(3,227)
DEFERRED TAX EXPENSE (BENEFIT) RELATED TO OTHER COMPREHENSIVE INCOME	(347)	641	(1,099)
OTHER COMPREHENSIVE INCOME, NET OF TAX	(645)	1,189	(2,128)
COMPREHENSIVE INCOME	$ 14,794	$ 15,932	$ 10,482