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Summary of Significant Accounting Policies - Basic and Diluted Shares Outstanding (Details) - shares
shares in Thousands
3 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Accounting Policies [Abstract]    
Weighted average common stock outstanding-Basic 21,306 21,018
Effect of dilutive options (in shares) 31 119
Weighted average common stock outstanding-Diluted 21,337 21,137
Options    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Antidilutive securities (in shares) 291 0