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Derivatives and Hedging Activities (Details) (USD $)
 12 Months Ended 12 Months Ended 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Interest Rate Swap [Member]
Dec. 31, 2013
Designated as Hedging Instrument [Member]
Interest Rate Swap [Member]
Accounts Payable And Other Liabilities [Member]
Dec. 31, 2012
Designated as Hedging Instrument [Member]
Interest Rate Swap [Member]
Accounts Payable And Other Liabilities [Member]
Dec. 31, 2013
Designated as Hedging Instrument [Member]
Cash Flow Hedging [Member]
Interest Rate Swap [Member]
derivative_instrument
Dec. 31, 2013
Designated as Hedging Instrument [Member]
Cash Flow Hedging [Member]
Interest Rate Swap [Member]
Interest Expense [Member]
Dec. 31, 2012
Designated as Hedging Instrument [Member]
Cash Flow Hedging [Member]
Interest Rate Swap [Member]
Interest Expense [Member]
Dec. 31, 2008
Not Designated as Hedging Instrument [Member]
Forward Contracts [Member]
Oct. 31, 2011
Not Designated as Hedging Instrument [Member]
Forward Contracts [Member]
Dec. 31, 2011
Not Designated as Hedging Instrument [Member]
Forward Contracts [Member]
Other Assets [Member]
Dec. 31, 2013
Secured Term Loan [Member]
Dec. 31, 2012
Secured Term Loan [Member]
Derivative [Line Items]                        
Debt instrument amount         $ 406,000,000           $ 151,000,000 $ 255,000,000
Derivative Instrument, Settlement Amount   3,539,000                    
Expected amount of derivative related interest to be reclassified to interest expense over the next 12 months 4,344,000                      
Number of derivative instruments held         8              
Notional amount of derivatives         406,000,000              
Forward purchase equity commitment, shares               3,500,000        
Share repurchases, final price paid per share               $ 5.60        
Forward contract indexed to issuers equity share settlement cash settlement value                 4,024,000      
Forward contract indexed to issuers equity share settlement shares retired                 3,974,645      
Derivative liabilities     4,439,000 (6,556,000)                
Amount of Loss Recognized in OCI on Derivative (Effective Portion)           7,559,000 (8,886,000)          
Amount of Loss Reclassified from Accumulated OCI into Income (Effective Portion)   1,837,000       3,104,000 724,000          
Amount of Gain (Loss) Recognized in Income on Derivative                   $ 2,030,000