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Consolidated Balance Sheets (Parenthetical) (USD $)
In Millions, except Share data, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Statement of Financial Position [Abstract]    
Loans receivable, from affiliates $ 8.7us-gaap_DueFromAffiliates $ 7.5us-gaap_DueFromAffiliates
Preferred stock, par value $ 0.01us-gaap_PreferredStockParOrStatedValuePerShare $ 0.01us-gaap_PreferredStockParOrStatedValuePerShare
Preferred stock, shares authorized 1,000,000us-gaap_PreferredStockSharesAuthorized 1,000,000us-gaap_PreferredStockSharesAuthorized
Preferred stock, shares issued 0us-gaap_PreferredStockSharesIssued 0us-gaap_PreferredStockSharesIssued
Common stock, par value $ 0.01us-gaap_CommonStockParOrStatedValuePerShare $ 0.01us-gaap_CommonStockParOrStatedValuePerShare
Common stock, shares authorized 80,000,000us-gaap_CommonStockSharesAuthorized 80,000,000us-gaap_CommonStockSharesAuthorized
Common stock, shares issued 20,597,671us-gaap_CommonStockSharesIssued 22,943,078us-gaap_CommonStockSharesIssued
Common stock, shares outstanding 20,597,671us-gaap_CommonStockSharesOutstanding 22,943,078us-gaap_CommonStockSharesOutstanding