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Stockholders' Equity (Narrative) (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Dec. 31, 2015
Equity, Class of Treasury Stock [Line Items]        
Stock Repurchase Program Authorized Amount1   $ 70,000    
Total number of shares purchased 803,985   803,985  
Treasury Stock Acquired, Average Cost Per Share $ 11.1      
Treasury Stock, Value, Acquired, Cost Method $ 8,900 0 $ 8,950  
Stock Repurchase Program Remaining Authorized Repurchase Amount1   $ 7,700    
Stock repurchase program remaining number of shares authorized to be repurchased   764,674    
SharePrice   $ 10.11    
Preferred Stock Issue Costs       $ 13,600
Common Stock Issuance Cost   $ 10,100    
legal surplus   74,800   70,400
Preferred Stock [Member]        
Equity, Class of Treasury Stock [Line Items]        
Preferred Stock Issue Costs   $ 13,600    
Common Stock [Member]        
Equity, Class of Treasury Stock [Line Items]        
Common Stock Issuance Cost       $ 10,100