XML 57 R46.htm IDEA: XBRL DOCUMENT v3.5.0.2
Commitments and Contingencies (Details) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Commitments and Contingencies Disclosure [Abstract]        
Rental expense for operating leases $ 2,600,000 $ 2,400,000 $ 5,300,000 $ 4,900,000
Defined benefit plan employer matching contribution on first five percent of employee compensation     50.00%  
Percentage of employees' eligible compensation for employer matching contribution     5.00%  
Defined benefit plan employer contribution limit     $ 6,000  
Defined benefit plan employer contribution vesting period     5 years  
Defined benefit plan employer contribution 300,000 $ 400,000 $ 700,000 $ 800,000
Letter Of Credit For Office Space [Member] | Line of Credit [Member]        
Line of Credit Facility [Line Items]        
Letter of credit outstanding 1,900,000   1,900,000  
Letter Of Credit For Security Deposit [Member] | Line of Credit [Member]        
Line of Credit Facility [Line Items]        
Letter of credit outstanding $ 100,000   $ 100,000