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Other Liabilities (Details) - USD ($)
$ in Thousands
Jun. 30, 2015
Dec. 31, 2014
Other Liabilities [Line Items]    
Share-based awards liability $ 0 $ 1,065
Other liabilities 12,327 13,802
Pension plan    
Other Liabilities [Line Items]    
Pension and supplemental executive retirement plan liability 2,980 3,079
SERP    
Other Liabilities [Line Items]    
Pension and supplemental executive retirement plan liability 7,519 7,431
Level 2 | Interest Rate Swap | Other Liabilities    
Other Liabilities [Line Items]    
Interest rate swap liability $ 1,828 $ 2,227