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Equity Awards - Restricted Shares Narrative (Details) (USD $)
 12 Months Ended 12 Months Ended 12 Months Ended 12 Months Ended 3 Months Ended 12 Months Ended
Dec. 31, 2013
Restricted Shares [Member]
Dec. 31, 2012
Restricted Shares [Member]
Dec. 31, 2011
Restricted Shares [Member]
Dec. 31, 2013
Restricted Shares [Member]
Non-employee independent director [Member]
Deferred Compensation, Share-based Payments [Member]
Dec. 31, 2012
Restricted Shares [Member]
Non-employee independent director [Member]
Deferred Compensation, Share-based Payments [Member]
Dec. 31, 2011
Restricted Shares [Member]
Non-employee independent director [Member]
Deferred Compensation, Share-based Payments [Member]
Dec. 31, 2013
Plan 1 [Member]
Service-based restriced shares [Member]
Dec. 31, 2012
Plan 1 [Member]
Service-based restriced shares [Member]
Dec. 31, 2011
Plan 1 [Member]
Service-based restriced shares [Member]
Dec. 31, 2013
Plan 2 [Member]
Service-based restriced shares [Member]
Dec. 31, 2012
Plan 2 [Member]
Service-based restriced shares [Member]
Dec. 31, 2011
Plan 2 [Member]
Service-based restriced shares [Member]
Dec. 31, 2013
Plan 3 [Member]
number
Dec. 31, 2013
Plan 3 [Member]
Restricted Shares [Member]
Dec. 31, 2012
Plan 3 [Member]
Restricted Shares [Member]
Dec. 31, 2013
Plan 3 [Member]
Service-based restriced shares [Member]
Dec. 31, 2013
Plan 3 [Member]
Performance-based restriced shares [Member]
Dec. 31, 2013
Plan 4 [Member]
number
Dec. 31, 2012
Plan 4 [Member]
Performance-based restriced shares [Member]
Dec. 31, 2013
Plan 5 [Member]
Service-based restriced shares [Member]
Non-employee independent director [Member]
Dec. 31, 2012
Plan 5 [Member]
Service-based restriced shares [Member]
Non-employee independent director [Member]
Dec. 31, 2011
Plan 5 [Member]
Service-based restriced shares [Member]
Non-employee independent director [Member]
Dec. 31, 2013
Plan 6 [Member]
number
Dec. 31, 2011
Plan 6 [Member]
Restricted Shares [Member]
Dec. 31, 2012
Plan 6 [Member]
Performance-based restriced shares [Member]
Dec. 31, 2012
Plan 6 [Member]
Market-based restricted shares [Member]
Dec. 31, 2013
Minimum [Member]
Plan 2 [Member]
Service-based restriced shares [Member]
Dec. 31, 2013
Minimum [Member]
Plan 4 [Member]
Performance-based restriced shares [Member]
Dec. 31, 2013
Maximum [Member]
Plan 4 [Member]
Performance-based restriced shares [Member]
Dec. 31, 2013
3 year cash flow metric [Member]
Plan 3 [Member]
Performance-based restriced shares [Member]
Dec. 31, 2013
3 year cash flow metric [Member]
Minimum [Member]
Plan 3 [Member]
Performance-based restriced shares [Member]
Dec. 31, 2013
3 year cash flow metric [Member]
Maximum [Member]
Plan 3 [Member]
Performance-based restriced shares [Member]
Dec. 31, 2013
3 year EPS CAGR metric [Member]
Plan 3 [Member]
Performance-based restriced shares [Member]
Dec. 31, 2013
3 year EPS CAGR metric [Member]
Minimum [Member]
Plan 3 [Member]
Performance-based restriced shares [Member]
Dec. 31, 2013
3 year EPS CAGR metric [Member]
Maximum [Member]
Plan 3 [Member]
Performance-based restriced shares [Member]
Mar. 31, 2013
2012 EPS growth metric [Member]
Plan 4 [Member]
Performance-based restriced shares [Member]
Dec. 31, 2013
2012 EPS growth metric [Member]
Plan 4 [Member]
Performance-based restriced shares [Member]
Dec. 31, 2013
2012 & 2013 EPS CAGR metric [Member]
Plan 4 [Member]
Performance-based restriced shares [Member]
Dec. 31, 2013
4 consecutive quarters cumulative EPS 1 [Member]
Plan 6 [Member]
Performance-based restriced shares [Member]
Dec. 31, 2012
4 consecutive quarters cumulative EPS 1 [Member]
Plan 6 [Member]
Performance-based restriced shares [Member]
Dec. 31, 2013
30 consecutive trading days stock price 1 [Member]
Plan 6 [Member]
Market-based restricted shares [Member]
Dec. 31, 2012
30 consecutive trading days stock price 1 [Member]
Plan 6 [Member]
Market-based restricted shares [Member]
Dec. 31, 2013
30 consecutive trading days stock price 2 [Member]
Plan 6 [Member]
Market-based restricted shares [Member]
Dec. 31, 2012
30 consecutive trading days stock price 2 [Member]
Plan 6 [Member]
Market-based restricted shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                                                                        
Number of Unvested Restricted Shares Granted 404,817           29,498 19,532 49,360 41,480 60,665 81,851   238,808 206,064 103,032 103,032   166,530 17,240 16,440 19,392   81,680 40,840 40,840                   72,576           20,420   20,420
Award requisite service period             3 years     1 year           3 years       1 year                                                
ICP, Threshold target for granting stock awards                                                     $ 20,000                                  
Cash value of incentive plan                   80.00%                                                                    
Restriced shares value of incentive plan                   20.00%                                                                    
Award Vesting Period                                 3 years                                                      
Award percentage earned based on metric over the performance period                                                           25.00%     75.00%       60.00% 40.00% 50.00%   50.00%   50.00%  
Share-based Compensation Arrangement by Share-based Payment Award, Award percentage attained                                                                         175.00% 125.00%            
Share-based Compensation Arrangement by Share-based Payment Award, Number of vesting metrics in restricted shares award type plan                                             2                                          
Number of performance metrics in restricted shares award type plan                         2         2                                                    
Amount of shares earned % of target award                                                       30.00% 250.00%   30.00% 200.00%   30.00% 250.00%                  
Restricted shares issued related to director fee deferrals       5,215 7,979 9,123                                                                            
Cumulative Earnings Per Share                                                                               2.00        
Closing Stock Price                                                                                   30   35
Risk-Free Interest Rate                                                   1.00%                                    
Expected Volatility                                                   70.00%                                    
Unrecognized Compensation Cost 6,600,000                                                                                      
Period for Recognition of Share-based Compensation Cost Not yet Recognized 1 year 11 months                                                                                      
Restricted shares-based compensation expense $ 9,200,000 $ 9,300,000 $ 3,200,000