Annual report pursuant to Section 13 and 15(d)

Condensed Consolidated Balance Sheets Condensed Consolidated Balance Sheets (Parenthetical)

v3.8.0.1
Condensed Consolidated Balance Sheets Condensed Consolidated Balance Sheets (Parenthetical) - USD ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Balance Sheet [Abstract]    
Allowance for Doubtful Accounts Receivable, Current $ 3,006 $ 1,714
Finite-Lived Intangible Assets, Accumulated Amortization $ 71,527 $ 61,334
Common Stock, Par or Stated Value Per Share $ 0.01 $ 0.01
Common Stock, Shares Authorized 50,000,000 50,000,000
Common Stock, Shares, Issued 29,454,062 30,090,335
Common Stock, Shares, Outstanding 29,454,062 30,090,335
Preferred Stock, Par or Stated Value Per Share $ 0.01 $ 0.01
Preferred Stock, Shares Authorized 5,000,000 5,000,000
Preferred Stock, Shares Issued 0 0
Preferred Stock, Shares Outstanding 0 0