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CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY - USD ($)
$ in Thousands
Total
Common Stock
Treasury
Additional Paid-In Capital
Retained Earnings
Noncontrolling Interest Non Redeemable
Beginning balance, Amount at Dec. 31, 2017 $ 506,591 $ 226 $ (42,249) $ 126,490 $ 364,401 $ 57,723
Beginning balance (in shares) at Dec. 31, 2017   22,640,046        
Beginning balance, Treasury (in shares) at Dec. 31, 2017     4,890,504      
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Net income [1] 5,592       4,995 597
Acquired noncontrolling interest 1,235         1,235
Noncontrolling interest distributions (615)         (615)
NCI acquired, net of sales 3,554     (2,029)   5,583
Purchase of additional controlling interest (56)     (44)   (12)
Nonvested stock compensation 1,601     1,601    
Restricted share grants   $ 2   (2)    
Restricted stock vesting (in shares)   165,567        
Treasury shares redeemed to pay income tax (3,467)   $ (3,467)      
Treasury shares redeemed to pay income tax (in shares)     56,772      
Issuance of common stock under Employee Stock Purchase Plan 332     332    
Issuance of common stock under Employee Stock Purchase Plan (in shares)   5,534        
Ending balance, Amount at Mar. 31, 2018 514,767 $ 228 $ (45,716) 126,348 369,396 64,511
Ending balance (in shares) at Mar. 31, 2018   22,811,147        
Ending balance, Treasury (in shares) at Mar. 31, 2018     4,947,276      
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Net income [1] 18,187       16,797 1,390
Acquired noncontrolling interest 35,239         35,239
Noncontrolling interest distributions (504)         (504)
NCI acquired, net of sales (591)     (591)   0
Nonvested stock compensation 2,318     2,318    
Restricted stock vesting (in shares)   10,818        
Treasury shares redeemed to pay income tax (628)   $ (628)      
Treasury shares redeemed to pay income tax (in shares)     6,389      
Merger consideration 795,405 $ 127   795,278    
Merger consideration (in shares)   12,765,288        
Issuance of common stock under Employee Stock Purchase Plan 302 $ 0   302    
Issuance of common stock under Employee Stock Purchase Plan (in shares)   5,171        
Ending balance, Amount at Jun. 30, 2018 1,364,495 $ 355 $ (46,344) 923,655 386,193 100,636
Ending balance (in shares) at Jun. 30, 2018   35,592,424        
Ending balance, Treasury (in shares) at Jun. 30, 2018     4,953,665      
Beginning balance, Amount at Dec. 31, 2018 $ 1,424,474 $ 356 $ (49,374) 937,968 427,975 107,549
Beginning balance (in shares) at Dec. 31, 2018   35,636,414        
Beginning balance, Treasury (in shares) at Dec. 31, 2018 (4,958,721)   (4,958,721)      
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Net income [1] $ 20,542       18,856 1,686
Acquired noncontrolling interest 820         820
Noncontrolling interest distributions (6,799)         (6,799)
NCI acquired, net of sales (18,000)         (18,000)
Nonvested stock compensation 1,804     1,804    
Restricted share grants 2 $ 2        
Restricted stock vesting (in shares)   174,562        
Treasury shares redeemed to pay income tax (7,692)   $ (7,577) (115)    
Treasury shares redeemed to pay income tax (in shares)     85,509      
Issuance of common stock under Employee Stock Purchase Plan $ 478     478    
Issuance of common stock under Employee Stock Purchase Plan (in shares) 5,357 5,357        
Ending balance, Amount at Mar. 31, 2019 $ 1,415,629 $ 358 $ (56,951) 940,135 446,831 85,256
Ending balance (in shares) at Mar. 31, 2019   35,816,333        
Ending balance, Treasury (in shares) at Mar. 31, 2019     (5,044,230)      
Beginning balance, Amount at Dec. 31, 2018 $ 1,424,474 $ 356 $ (49,374) 937,968 427,975 107,549
Beginning balance (in shares) at Dec. 31, 2018   35,636,414        
Beginning balance, Treasury (in shares) at Dec. 31, 2018 (4,958,721)   (4,958,721)      
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Treasury shares redeemed to pay income tax (in shares) 66,181          
Ending balance, Amount at Jun. 30, 2019 $ 1,448,047 $ 358 $ (57,893) 941,923 471,831 91,828
Ending balance (in shares) at Jun. 30, 2019   35,837,779        
Ending balance, Treasury (in shares) at Jun. 30, 2019 (5,052,927)   5,052,927      
Beginning balance, Amount at Mar. 31, 2019 $ 1,415,629 $ 358 $ (56,951) 940,135 446,831 85,256
Beginning balance (in shares) at Mar. 31, 2019   35,816,333        
Beginning balance, Treasury (in shares) at Mar. 31, 2019     (5,044,230)      
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Net income [1] 26,897       25,000 1,897
Acquired noncontrolling interest 6,170         6,170
Noncontrolling interest distributions (2,026)         (2,026)
NCI acquired, net of sales (752)     (1,283)   531
Nonvested stock compensation 2,588     2,588    
Restricted stock vesting (in shares)   17,145        
Treasury shares redeemed to pay income tax (912)   $ (942) 30    
Treasury shares redeemed to pay income tax (in shares)     8,697      
Issuance of common stock under Employee Stock Purchase Plan $ 453     453    
Issuance of common stock under Employee Stock Purchase Plan (in shares) 4,301 4,301        
Ending balance, Amount at Jun. 30, 2019 $ 1,448,047 $ 358 $ (57,893) $ 941,923 $ 471,831 $ 91,828
Ending balance (in shares) at Jun. 30, 2019   35,837,779        
Ending balance, Treasury (in shares) at Jun. 30, 2019 (5,052,927)   5,052,927      
[1]
Net income excludes net income attributable to noncontrolling interest-redeemable of $2.5 million and $4.9 million during the three and six months ending June 30, 2018, respectively. Noncontrolling interest-redeemable is reflected outside of permanent equity on the condensed consolidated balance sheets. See Note 8 of the Notes to Condensed Consolidated Financial Statements.