Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017
Statement of Financial Position [Abstract]
SECURITIES HELD-TO-MATURITY, fair value			$ 116
Common stock, par value	$ 0.01	$ 0.01	$ 0.01
Common stock, shares authorized	120,000,000	120,000,000	120,000,000
Common stock, shares issued	67,612,760	66,260,444	66,131,832
Treasury stock, shares	493,994	495,964	503,105