PARENT COMPANY ONLY FINANCIAL STATEMENTS - CONDENSED BALANCE SHEETS (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
ASSETS
Cash and due from banks	$ 26,562	$ 18,351
Interest-bearing deposits in financial institutions	114,119	370,656
Total cash and cash equivalents	140,681	389,007	$ 124,906	$ 68,923
Investment in Patriot Bancshares Capital Trust I and II	666	666
Loans held for sale	7,156	23,989
Loans held for investment	3,190,485	3,098,220
Goodwill	85,291	85,291	85,291
Other assets	14,950	31,375
TOTAL ASSETS	4,261,916	4,024,822
LIABILITIES AND SHAREHOLDERS’ EQUITY
Subordinated debentures	47,737	47,492
Other liabilities	20,227	16,268
Total liabilities	3,798,121	3,594,340
SHAREHOLDERS’ EQUITY:
Common stock	373	372
Capital surplus	387,891	382,961
Retained earnings	83,263	49,127
Accumulated other comprehensive income, net	(6,479)	(725)
Less treasury shares, at cost	(1,253)	(1,253)
Total shareholders’ equity	463,795	430,482	429,402	288,405
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	4,261,916	4,024,822
Green Bancorp, Inc.
ASSETS
Cash and due from banks	734	4,534
Interest-bearing deposits in financial institutions	208	6,461
Total cash and cash equivalents	942	10,995	$ 10,322	$ 8,666
Investment in Green Bank, N.A.	489,336	422,802
Investment in Patriot Bancshares Capital Trust I and II	666	666
Loans held for sale	0	6,598
Loans held for investment	3,062	26,221
Goodwill	12,673	12,673
Other assets	6,692	1,277
TOTAL ASSETS	513,371	481,232
LIABILITIES AND SHAREHOLDERS’ EQUITY
Subordinated debentures	47,737	47,492
Deferred tax liability, net	1,100	2,907
Other liabilities	739	351
Total liabilities	49,576	50,750
SHAREHOLDERS’ EQUITY:
Common stock	373	372
Capital surplus	387,891	382,961
Retained earnings	83,263	49,127
Accumulated other comprehensive income, net	(6,479)	(725)
Less treasury shares, at cost	(1,253)
Total shareholders’ equity	463,795	430,482
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	$ 513,371	$ 481,232