Basis of Presentation (Policies)

6 Months Ended

Jun. 30, 2018

Organization Consolidation And Presentation Of Financial Statements [Abstract]

Foreign Currency Transactions and Translations

Foreign Currency Transactions and Translation:Through the acquisitions of Layne and LiquiForce, we now have operations in Latin America, Canada and Brazil which involve exposure to possible volatile movements in foreign currency exchange rates. We account for foreign currency exchange transactions and translation in accordance with ASC Topic 830, Foreign Currency Matters. Foreign currency transactions are remeasured into the functional currency with gains and losses included in other income, net in the condensed consolidated statements of operations. In Mexico, most of our customer contracts are denominated in U.S. dollars; therefore, the functional currency is U.S. dollars. In Canada and Brazil, the functional currency is the local currency. The impact from foreign currency transactions was immaterial for both the three and six months ended June 30, 2018. Assets and liabilities in functional currency are translated into U.S. dollars at exchange rates prevailing at the balance sheet date. Revenues and expenses are translated into U.S. dollars at average foreign currency exchange rates prevailing during the reporting periods. The translation adjustments from functional currency to U.S. dollars are reported in accumulated other comprehensive income on the condensed consolidated balance sheets.

Cash, Cash Equivalents and Restricted Cash

Cash, Cash Equivalents and Restricted Cash: In connection with the acquisition of Layne, we acquired restricted cash which is included in other noncurrent assets in the condensed consolidated balance sheets and consists of escrow funds and judicial deposits associated with tax related legal proceedings in Brazil. The table below presents changes in restricted cash and cash equivalents on the condensed consolidated statements of cash flows and a reconciliation to the amounts reported in the condensed consolidated balance sheets (in thousands).

Six Months Ended June 30,	2018			2017
Cash and cash equivalents, beginning of period	$	233,711		$	189,326
End of the period
Cash and cash equivalents		195,515			178,068
Restricted cash		5,746			—
Total cash, cash equivalents and restricted cash, end of period		201,261			178,068
Net decrease in cash, cash equivalents and restricted cash	$	(32,450	)	$	(11,258	)

Inventories

Inventories: Inventories consist primarily of quarry products, contract-specific materials, water well drilling materials, and sewer remediation materials that are located in the U.S. and mineral extraction and drilling supplies located in the U.S. and foreign countries, primarily Brazil and Mexico. Cost of U.S. and foreign inventories are valued at the lower of average cost or net realizable value. We reserve quarry products based on estimated quantities of materials on hand in excess of approximately one year of demand. As of June 30, 2018, inventory included $19.1 million of supplies related to the Water and Mineral Services operating group.