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Accumulated Other Comprehensive Loss | 6 Months Ended
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Jun. 30, 2018
Stockholders' Equity Note [Abstract] |
Accumulated Other Comprehensive Loss | Accumulated Other Comprehensive Loss The changes in the balances of accumulated other comprehensive loss by component are as follows:
(in thousands) | Foreign currency translation adjustment |  | Defined benefit pension plan |  | Liquidation of non-US entity and purchase of non-controlling interests |  | Total
Balance at December 31, 2017 | $ | (19,319 | ) |  | $ | (2,555 | ) |  | $ | 338 |  |  | $ | (21,536 | )
Other comprehensive income (loss) | (11,489 | ) |  | 147 |  |  | — |  |  | (11,342 | )
Balance at June 30, 2018 | $ | (30,808 | ) |  | $ | (2,408 | ) |  | $ | 338 |  |  | $ | (32,878 | )
The amounts presented above are in other comprehensive loss and are net of taxes. For additional information about foreign currency translation, see Note 6.

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- Definition The entire disclosure for shareholders' equity comprised of portions attributable to the parent entity and noncontrolling interest, including other comprehensive income. Includes, but is not limited to, balances of common stock, preferred stock, additional paid-in capital, other capital and retained earnings, accumulated balance for each classification of other comprehensive income and amount of comprehensive income. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -URI http://asc.fasb.org/topic&trid=2208762 + Details
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