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CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($)
$ in Thousands
Total
Common Stock
Additional Paid-In Capital
Accumulated Other Comprehensive Income
Cumulative Earnings
Cumulative Distributions to Stockholders
Beginning balance at Dec. 31, 2016 $ 1,149,428 $ 768 $ 1,676,486 $ 71,853 $ 1,149,935 $ (1,749,614)
Beginning balance (in shares) at Dec. 31, 2016   76,834,663        
Increase (Decrease) in Stockholders' Equity            
Net Income 36,969       36,969  
Other comprehensive income (loss) 749     749    
Employee stock purchase and incentive plans (1,528) $ 2 (1,530)      
Employee stock purchase and incentive plans (in shares)   204,062        
Non-cash equity award compensation 2,242   2,242      
Common dividends declared (22,089)         (22,089)
Ending balance at Mar. 31, 2017 1,165,771 $ 770 1,677,198 72,602 1,186,904 (1,771,703)
Ending balance (in shares) at Mar. 31, 2017   77,038,725        
Beginning balance at Dec. 31, 2016 1,149,428 $ 768 1,676,486 71,853 1,149,935 (1,749,614)
Beginning balance (in shares) at Dec. 31, 2016   76,834,663        
Ending balance at Dec. 31, 2017 1,212,287 $ 766 1,673,845 85,248 1,290,341 (1,837,913)
Ending balance (in shares) at Dec. 31, 2017   76,599,972        
Increase (Decrease) in Stockholders' Equity            
Net Income 46,845       46,845  
Other comprehensive income (loss) (5,193)     (5,193)    
Employee stock purchase and incentive plans (283) $ 1 (284)      
Employee stock purchase and incentive plans (in shares)   143,964        
Non-cash equity award compensation 3,674   3,674      
Share repurchases (15,544) $ (10) (15,534)      
Share repurchases (in shares)   (1,040,829)        
Common dividends declared (21,803)         (21,803)
Ending balance at Mar. 31, 2018 $ 1,219,983 $ 757 $ 1,661,701 $ 80,055 $ 1,337,186 $ (1,859,716)
Ending balance (in shares) at Mar. 31, 2018   75,703,107