XML 67 R50.htm IDEA: XBRL DOCUMENT v3.3.1.900
Acquisition of Polygon Northwest Homes - Summary of Unaudited Pro Forma Amounts (Details) - Polygon Northwest Homes - USD ($)
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Business Acquisition [Line Items]    
Operating revenues $ 1,048,600 $ 864,400
Net income available to common stockholders $ 53,400 $ 141,100
Income per share - basic (in USD per share) $ 1.68 $ 5.70
Income per share - diluted (in USD per share) $ 1.61 $ 5.47