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Consolidated Balance Sheets (Parenthetical) (USD $)
Mar. 31, 2015
Dec. 31, 2014
Consolidated Balance Sheets    
Preferred stock, Par value (in dollars per share) $ 1us-gaap_PreferredStockParOrStatedValuePerShare $ 1us-gaap_PreferredStockParOrStatedValuePerShare
Preferred stock, Liquidation value (in dollars per share) $ 1,000us-gaap_PreferredStockLiquidationPreference $ 1,000us-gaap_PreferredStockLiquidationPreference
Preferred stock, Shares authorized 300,000us-gaap_PreferredStockSharesAuthorized 300,000us-gaap_PreferredStockSharesAuthorized
Preferred stock, Shares issued 31,553us-gaap_PreferredStockSharesIssued 47,331us-gaap_PreferredStockSharesIssued
Preferred stock, Shares outstanding 31,553us-gaap_PreferredStockSharesOutstanding 47,331us-gaap_PreferredStockSharesOutstanding
Common stock, Par value (in dollars per share) $ 1us-gaap_CommonStockParOrStatedValuePerShare $ 1us-gaap_CommonStockParOrStatedValuePerShare
Common Stock, Shares authorized 60,000,000us-gaap_CommonStockSharesAuthorized 60,000,000us-gaap_CommonStockSharesAuthorized
Common stock, Shares issued 34,414,734us-gaap_CommonStockSharesIssued 34,364,734us-gaap_CommonStockSharesIssued
Common stock, Shares outstanding 29,470,929us-gaap_CommonStockSharesOutstanding 29,442,508us-gaap_CommonStockSharesOutstanding
Treasury stock, Shares 4,943,805us-gaap_TreasuryStockShares 4,922,226us-gaap_TreasuryStockShares