INVESTMENT SECURITIES - AMORTIZED COST AND FV (Details) - USD ($)	3 Months Ended		12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016	Dec. 31, 2008
Securities available for Sale - Amortized Cost
Due in one year or less	$ 96,033,000
Due from one year to five years	229,351,000
Due from five years to ten years	10,000,000
Due beyond ten years	3,460,000
Total securities	524,061,000
Securities available for Sale - Fair Value
Due in one year or less	96,079,000
Due from one year to five years	228,480,000
Due from five years to ten years	10,224,000
Due beyond ten years	3,200,000
Total securities	526,270,000
Securities held to maturity - Carrying Value
Due in one year or less	504,000
Due from one year to five years	5,075,000
Due from five years to ten years	19,984,000
Total securities	51,860,000		$ 52,864,000
Securities held to maturity - Fair Value
Due in one year or less	502,000
Due from one year to five years	5,015,000
Due from five years to ten years	20,423,000
Total securities	$ 52,479,000		$ 53,249,000
Number of Securities Held	182		179
Securities available for sale	$ 526,270,000		$ 481,275,000
Total unrealized gain	706,000	$ 2,292,000
Private label mortgage backed security
Securities available for Sale - Amortized Cost
Securities not due at a single maturity date	3,543,000
Securities available for Sale - Fair Value
Securities not due at a single maturity date	$ 4,682,000
Securities held to maturity - Fair Value
Number of Securities Held	1
Securities available for sale	$ 4,682,000		4,777,000
Mortgage backed securities - residential
Securities available for Sale - Amortized Cost
Securities not due at a single maturity date	95,857,000
Securities available for Sale - Fair Value
Securities not due at a single maturity date	97,822,000
Securities held to maturity - Carrying Value
Securities not due at a single maturity date	156,000
Total securities	156,000		158,000
Securities held to maturity - Fair Value
Securities not due at a single maturity date	167,000
Total securities	167,000		170,000
Securities available for sale	97,822,000		73,004,000
Collateralized mortgage obligations
Securities available for Sale - Amortized Cost
Securities not due at a single maturity date	83,317,000
Securities available for Sale - Fair Value
Securities not due at a single maturity date	82,931,000
Securities held to maturity - Carrying Value
Securities not due at a single maturity date	26,141,000
Total securities	26,141,000		27,142,000
Securities held to maturity - Fair Value
Securities not due at a single maturity date	26,372,000
Total securities	26,372,000		27,268,000
Securities available for sale	82,931,000		87,654,000
Freddie Mac preferred stock
Securities available for Sale - Fair Value
Securities not due at a single maturity date	394,000
Securities held to maturity - Fair Value
Number of Securities Held				40,000
Other Than Temporary Impairment ("OTTI") charge				$ 2,100,000
Securities available for sale	394,000		483,000	$ 0
Total unrealized gain	394,000
Community Reinvestment Act mutual fund
Securities available for Sale - Amortized Cost
Securities not due at a single maturity date	2,500,000
Securities available for Sale - Fair Value
Securities not due at a single maturity date	2,458,000
Securities held to maturity - Fair Value
Securities available for sale	2,458,000		2,455,000
Corporate bonds
Securities held to maturity - Carrying Value
Total securities	25,059,000		25,058,000
Securities held to maturity - Fair Value
Total securities	25,437,000		25,307,000
Securities available for sale	$ 15,258,000		$ 15,158,000
Percentage of concentration risk	7.00%		8.00%