XML 22 R6.htm IDEA: XBRL DOCUMENT v3.8.0.1
Consolidated Statements of Stockholders' Equity (Parentheticals) - AOCI Attributable to Parent [Member] - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Unrealized gain (loss) on interest rate swaps, tax $ 2,384 $ 341 $ (609)
Pension liability adjustment, tax $ 21 $ 207 $ 1,176