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Consolidated Balance Sheets (Parenthetical) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Common stock, par value	$ 0.10us-gaap_CommonStockParOrStatedValuePerShare	$ 0.10us-gaap_CommonStockParOrStatedValuePerShare
Common stock, shares authorized	75,000,000us-gaap_CommonStockSharesAuthorized	75,000,000us-gaap_CommonStockSharesAuthorized
Common stock, shares issued	26,968,212us-gaap_CommonStockSharesIssued	26,846,470us-gaap_CommonStockSharesIssued
Treasury stock, common shares	4,320,462us-gaap_TreasuryStockShares	4,320,462us-gaap_TreasuryStockShares
Series B Preferred Stock [Member]
Preferred stock, shares outstanding	20,000us-gaap_PreferredStockSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember	20,000us-gaap_PreferredStockSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember
Preferred stock, shares issued	20,000us-gaap_PreferredStockSharesIssued / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember	20,000us-gaap_PreferredStockSharesIssued / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember
Convertible preferred stock dividend rate	12.00%us-gaap_PreferredStockDividendRatePercentage / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember	12.00%us-gaap_PreferredStockDividendRatePercentage / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember
Series B cumulative, convertible preferred stock, par value	$ 100us-gaap_PreferredStockParOrStatedValuePerShare / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember	$ 100us-gaap_PreferredStockParOrStatedValuePerShare / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesBPreferredStockMember
Series D Preferred Stock [Member]
Preferred stock, shares outstanding	1,000,000us-gaap_PreferredStockSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesDPreferredStockMember	1,000,000us-gaap_PreferredStockSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesDPreferredStockMember
Preferred stock, shares issued	1,000,000us-gaap_PreferredStockSharesIssued / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesDPreferredStockMember	1,000,000us-gaap_PreferredStockSharesIssued / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesDPreferredStockMember
Convertible preferred stock dividend rate	6.00%us-gaap_PreferredStockDividendRatePercentage / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesDPreferredStockMember	6.00%us-gaap_PreferredStockDividendRatePercentage / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesDPreferredStockMember
Series D cumulative, convertible Class C preferred stock, par value	$ 0us-gaap_PreferredStockNoParValue / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesDPreferredStockMember	$ 0us-gaap_PreferredStockNoParValue / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesDPreferredStockMember

X

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Face amount or stated value per share of common stock.

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The maximum number of common shares permitted to be issued by an entity's charter and bylaws.

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