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CONSOLIDATED BALANCE SHEETS [Parenthetical] - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Allowance for Doubtful Accounts Receivable, Current $ 432 $ 376
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment 209,466 181,575
Finite-Lived Intangible Assets, Accumulated Amortization $ 4,684 $ 3,798
Preferred Stock, Par or Stated Value Per Share $ 0.01 $ 0.01
Preferred Stock, Shares Authorized 4,000,000 4,000,000
Preferred Stock, Shares Issued 0 0
Preferred Stock, Shares Outstanding 0 0
Common Stock, Par or Stated Value Per Share $ 0.01 $ 0.01
Common Stock, Shares Authorized 100,000,000 100,000,000
Common Stock, Shares, Issued 16,333,139 19,969,347
Common Stock, Shares, Outstanding 16,333,139 19,969,347