Off-Balance Sheet Arrangements, Commitments And Contingencies (Details) - USD ($) $ in Thousands		12 Months Ended
	Jan. 01, 2016	Dec. 31, 2015
Certificates and other time deposits
1 year or less		$ 776,368
More than 1 year but less than 3 years		455,919
3 years or more but less than 5 years		120,477
Total		1,352,764
Federal Home Loan Bank advances
1 year or less		111,404
More than 1 year but less than 3 years		112,642
3 years or more but less than 5 years		94
5 years or more		520
Total		224,660
Subordinated Debentures
1 year or less		505
More than 1 year but less than 3 years		1,010
3 years or more but less than 5 years		1,010
5 years or more		30,446
Total		32,971
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
1 year or less		2,408
More than 1 year but less than 3 years		3,212
3 years or more but less than 5 years		1,766
Operating Leases, Future Minimum Payments, Due Thereafter		3,415
Total		10,801
Contractual obligations (other than securities sold under agreements to repurchase)
1 year or less		890,685
More than 1 year but less than 3 years		572,783
3 years or more but less than 5 years		123,347
5 years or more		34,381
Total		1,621,196
Interest expense on subordinated debentures		227
Forecast
Contractual obligations (other than securities sold under agreements to repurchase)
Interest Expense, Loans from Other Federal Home Loan Banks	$ 1,500
Interest expense on subordinated debentures	$ 10,800
Green Bancorp, Inc.
Contractual obligations (other than securities sold under agreements to repurchase)
Interest expense on subordinated debentures		$ 227