Stock-based Compensation (Details) (USD $)
12 Months Ended
Dec. 31, 2013
Stock-based compensation  
Non-cash share compensation $ 433,000
Restricted common shares
 
Stock-based compensation  
Maximum number of shares authorized 600,000
Granted (in shares) 250,000
Grant date value (in dollars per share) $ 11.50
Grant date value (in dollars) 2,900,000
Vesting period 3 years
Non-cash share compensation 400,000
Unrecognized compensation expense $ 2,500,000
Initial estimated cumulative forfeiture rate (as a percent) 0.00%