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Basis of Financial Statement Presentation (Details) - USD ($)
$ in Thousands
3 Months Ended
Jan. 01, 2016
Mar. 31, 2016
Mar. 31, 2015
New Accounting Pronouncement, Early Adoption [Line Items]      
Increase in diluted weighted shares outstanding due to early adoption of new accounting pronouncement (in shares)   17,036,000 17,109,000
Effective income tax rate reconciliation, tax benefit attributable to stock option exercises and restricted stock vesting   $ 12,783 $ (1,097)
New Accounting Pronouncement, Early Adoption, Effect      
New Accounting Pronouncement, Early Adoption [Line Items]      
Amount reclassified out of current deferred income tax assets   4,600  
Accounting Standards Update 2016-09 | New Accounting Pronouncement, Early Adoption, Effect      
New Accounting Pronouncement, Early Adoption [Line Items]      
Discrete tax benefit   $ 300  
Increase in diluted weighted shares outstanding due to early adoption of new accounting pronouncement (in shares)   28,027  
Effective income tax rate reconciliation, tax benefit attributable to stock option exercises and restricted stock vesting   $ 300  
Cumulative effect to retained earnings due to early adoption of new accounting pronouncement $ 100