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Stockholders' Equity Stockholders' Equity (Summary of Options) (Details) (USD $)
 0 Months Ended 12 Months Ended
May 22, 2013
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]        
Outstanding at beginning of period (in shares)   312,000 321,000 445,000
Granted (in shares) 562,500 563,000 96,283 210,549
Exercised (in shares)   (45,000) (81,000) (173,000)
Canceled or expired (in shares)   (64,000) (24,000) (162,000)
Outstanding at end of year (in shares)   766,000 312,000 321,000
Exercisable at end of year (in shares)   192,000 145,000 106,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]        
Outstanding at beginning of period   $ 5.41 $ 5.17 $ 4.74
Granted   $ 16.73 $ 5.94 $ 5.69
Exercised   $ 5.33 $ 4.90 $ 5.56
Canceled or expired   $ 13.82 $ 5.94 $ 5.24
Outstanding at end of year   $ 13.03 $ 5.41 $ 5.17
Exercisable at end of year   $ 5.36 $ 5.13 $ 4.75