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Stockholders' Equity (Narrative) (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Dec. 31, 2015
Equity, Class of Treasury Stock [Line Items]        
Stock Repurchase Program Authorized Amount1   $ 70,000    
Total number of shares purchased 303,985   303,985  
Treasury Stock Acquired, Average Cost Per Share $ 13.9      
Treasury Stock, Value, Acquired, Cost Method $ 4,200 0 $ 4,238  
Stock Repurchase Program Remaining Authorized Repurchase Amount1   $ 7,700    
Stock repurchase program remaining number of shares authorized to be repurchased   931,428    
SharePrice   $ 8.3    
Preferred Stock Issue Costs       $ 13,600
Common Stock Issuance Cost   $ 10,100    
legal surplus   73,300   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