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Consolidated Businesses - Reconciliation of Activity Related to Redeemable Noncontrolling Interest (Detail) - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Dec. 31, 2015
Dec. 31, 2014
Reconciliation activity related to the redeemable non controlling interest        
Balance at Beginning $ 10,506      
Balance at End 6,362      
Payments to acquired additional interest in subsidiaries 5,400 $ 4,000    
Redeemable Noncontrolling Interest        
Reconciliation activity related to the redeemable non controlling interest        
Balance at Beginning 10,506 10,346    
Redeemable noncontrolling interest portion of subsidiary net loss (129) (148)    
Accretion to estimated redemption value 1,232 3,638    
Equity transfer among owners (5,247) (3,339)    
Impact of subsidiary equity transactions   (2,110)    
Balance at End 6,362 8,387    
GovDelivery        
Reconciliation activity related to the redeemable non controlling interest        
Accretion to value adjustment 200 700    
Payments to acquired additional interest in subsidiaries $ 2,500 $ 1,900    
Ownership percentage by parent 94.00% 93.00% 92.00% 91.00%
VelocityEHS        
Reconciliation activity related to the redeemable non controlling interest        
Payments to acquired additional interest in subsidiaries $ 2,400 $ 1,400    
Ownership percentage by parent 99.00% 98.00% 98.00% 96.00%
FolioDynamix        
Reconciliation activity related to the redeemable non controlling interest        
Payments to acquired additional interest in subsidiaries $ 500