Interim Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 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	51,655,607	51,655,607
Common stock, shares outstanding	51,655,607	51,655,607
Available-for-sale securities, cost	$ 12,044,717	$ 13,894,348
Held-to-maturity securities	$ 14,131,154	$ 14,115,272