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Stockholders' Equity - Additional Information (Details) - USD ($)
$ / shares in Units, $ in Thousands
 12 Months Ended 105 Months Ended
Jan. 17, 2017
Jan. 03, 2017
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2016
Stockholders' Equity Note [Abstract]            
Dividends paid (in dollars per share)     $ 1.20 $ 1.12 $ 1.00  
Options vesting and exercisable period, maximum     8 years      
Total intrinsic value of stock options exercised     $ 23,236 $ 14,174 $ 7,466  
Total unrecognized stock-based compensation expense     $ 14,455     $ 14,455
Weighted average period over which total unrecognized stock-based compensation expense will be recognized     4 years 6 months 21 days      
Total grant date fair value of stock options vested     $ 7,083 5,143 7,287  
Total stock-based compensation expense     $ 4,100 $ 5,841 $ 7,039  
Options termination period     9 years      
Subsequent Event [Line Items]            
Options Granted (in shares)           6,413,660
Subsequent Event [Member]            
Subsequent Event [Line Items]            
Dividend declared (in dollars per share) $ 0.32          
Options Granted (in shares)   764,789        
Option Exercise (Strike) Price (in dollars per share)   $ 47.00        
Closing Stock Price on Date of Grant (in dollars per share)   $ 46.95