Stockholders' Equity (Narrative) (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Equity, Class of Treasury Stock [Line Items]
Treasury Stock, Value, Acquired, Cost Method	$ 0	$ 0	$ 8,950
Stock Repurchase Program Remaining Authorized Repurchase Amount1	$ 7,700
Stock repurchase program remaining number of shares authorized to be repurchased	822,431
SharePrice	$ 9.4
legal surplus	$ 81,500	76,300
Preferred Stock [Member]
Equity, Class of Treasury Stock [Line Items]
Preferred Stock Issue Costs	13,600	13,600
Common Stock [Member]
Equity, Class of Treasury Stock [Line Items]
Common Stock Issuance Cost	$ 10,100	$ 10,100
Seventy Millions Repurchase Program [Member]
Equity, Class of Treasury Stock [Line Items]
Total number of shares purchased			803,985
Treasury Stock Acquired, Average Cost Per Share			$ 11.1
Treasury Stock, Value, Acquired, Cost Method			$ 8,900