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Stock-Based Compensation (Stock-Based Compensation Textuals) (Details) (USD $)
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Shares authorized under stock option plan (shares) 1,828,544    
Stock options outstanding (number of options) 3,078,000 4,437,000  
Stock Options [Member]
     
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock options outstanding (number of options) 3,077,658    
Term life of stock options (years) P10Y    
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period 4 years    
Allocated Share-based Compensation Expense $ 226,000 $ 310,000 $ 900,000
Unrecognized compensation cost 148,000    
Recognition period of future compensation expense over weighted average (in years) 1 year 1 month    
Cash proceeds from the exercise of stock options 2,300,000    
Fair value of options exercisable 1,700,000    
Weighted average contractual life of outstanding options (in years) 3 years 2 months    
Weighted average contractual life of exercisable options (in years)   3 years 3 months  
Restricted Stock [Member]
     
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period   3 years  
Unrecognized compensation cost 1,900,000    
Number of restricted stock units granted 159,782 470,306 214,206
Cliff vesting period (in years)   3 years  
Compensation expense, restricted stock 1,800,000 2,000,000 1,100,000
Unrecognized compensation cost, period for recognition (in years) 1 year 6 months    
Total fair value of the restricted stock which vested 3,100,000    
Time-vested restricted stock units [Member]
     
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Number of restricted stock units granted 57,246    
Cliff vesting period (in years) 3 years    
Restricted Stock Units (RSUs) [Member]
     
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Unrecognized compensation cost, period for recognition (in years) 1 year 11 months    
Total cash paid for vesting and dividend payments 1,100,000    
Estimate of future expense for all types of RSUs outstanding 5,300,000    
Recognized compensation expense related to RSUs for employees and directors, before capitalization or income tax benefit, if any 5,300,000 2,500,000 1,000,000
Performance-based RSU [Member]
     
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period 3 years    
Number of restricted stock units granted 196,000    
Payout range minimum 0.00%    
Payout range maximum 200.00%    
Long-term incentive compensation [Member]
     
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Allocated Share-based Compensation Expense (286,000) 101,000 (767,000)
Allocated Share-based Compensation Expense, over Life of Award $ 353,000    
Chief Executive Officer [Member] | Performance-based RSU [Member]
     
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period   5 years  
Number of restricted stock units granted   281,532  
Payout range minimum 0.00%    
Payout range maximum 150.00%