Consolidated Statement of Changes in Shareholders' Equity (Unaudited) (Parenthetical) - $ / shares shares in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Common stock per share dividend amount	$ 0.70	$ 0.70	$ 1.40	$ 1.40
Common Stock [Member] | Series A Warrants [Member]
Exercise of warrants into shares of common stock		2,315		2,315
Exercise of warrants into shares of common stock				904
Retained Earnings [Member]
Common stock per share dividend amount			$ 1.40	$ 1.40
Treasury Stock [Member] | Series A Warrants [Member]
Exercise of warrants into shares of common stock	5,320		5,320
Exercise of warrants into shares of common stock			1,983