Interim Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Statement of Financial Position [Abstract]
Preferred stock, par value, in usd per share	$ 0.001	$ 0.001
Preferred stock, shares authorized	20,000,000	20,000,000
Preferred stock, shares issued	350,000	350,000
Preferred stock, shares outstanding	350,000	350,000
Common stock, par value, in usd per share	$ 0.001	$ 0.001
Common stock, shares authorized	150,000,000	150,000,000
Common stock, shares, issued	51,740,714	51,655,607
Common stock, shares outstanding	51,740,714	51,655,607
Available-for-sale securities, cost	$ 17,800,589	$ 13,894,348
Held-to-maturity securities	$ 13,541,461	$ 14,115,272