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Stockholders' Equity (Details) (USD $)
 1 Months Ended 3 Months Ended 6 Months Ended 12 Months Ended 1 Months Ended 6 Months Ended 1 Months Ended
Jun. 30, 2013
May 31, 2013
Apr. 30, 2013
Jun. 30, 2013
Jun. 30, 2012
Jun. 30, 2010
Jun. 30, 2013
Jun. 30, 2012
Dec. 31, 2008
Jan. 25, 2008
Jun. 30, 2013
Common Stock [Member]
May 31, 2013
Common Stock [Member]
Apr. 30, 2013
Common Stock [Member]
Mar. 31, 2013
Common Stock [Member]
Jun. 30, 2013
Common Stock [Member]
Apr. 30, 2013
Preferred Stock [Member]
Series A Preferred Stock [Member]
Summary of changes in stockholders' equity [Roll Forward]                                
Balance at beginning of period             $ 262,299,000                  
Net Income       1,859,000 704,000   3,512,000 8,640,000                
Issuance of Preferred Stock             23,480,000                  
Common Stock Dividends             (4,120,000)                  
Unrealized Foreign Currency Translation Gain       206,000 (170,000)   246,000 (79,000)                
Net Change in Fair Value of Derivatives       962,000 (1,127,000)   1,509,000 70,000                
Net Change in Funding Status of Defined Benefit Plan       310,000 260,000   621,000 519,000                
Stock-based compensation expense (net of forfeited shares)             347,000                  
Balance at end of period 287,894,000     287,894,000     287,894,000                  
Stock Repurchase Program [Abstract]                                
Shares authorized for repurchase (in shares)                   1,000,000            
Total number of shares purchased (in shares) 0 0 0     223,051     491,572              
Payments for shares purchased           5,200,000     11,500,000              
Average Price Paid per Share (in dollars per share) $ 0 $ 0 $ 0                          
Total Number of Shares Purchased as Part of Publicly Announced Plan (in shares) 0 0 0                          
Maximum Number of Shares that May Yet Be Purchased Under the Plan (in shares) 285,377 285,377 285,377 285,377     285,377                  
Dividend Payments [Abstract]                                
Record Date                     May 16, 2013 May 07, 2013 Apr. 23, 2013 Feb. 19, 2013   Apr. 29, 2013
Payment Date                     Jun. 03, 2013 May 08, 2013 Apr. 29, 2013 Mar. 04, 2013   Apr. 30, 2013
Per Share Amount (in dollars per share)                     $ 0.250 $ 1.000 $ 1.000 $ 0.250    
Total Dividend Paid     448,000               1,812,000 29,000 5,000 1,803,000 3,649,000 448,000
Per Share Amount (in dollars per share)                               $ 1.79
Payment of cash dividends related to unvested stock awards       $ 23,488