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Condensed consolidating financial statements (Condensed consolidating statements of cash flows) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Condensed Cash Flow Statements, Captions [Line Items] |  |  |
Cash flows from (used in) operating activities | $ 64,742 | $ 155,913 | $ 269,966
Cash flows from investing activities |  |  |
Acquisition of businesses, net of cash acquired | (4,072) | (60,836) | (38,289)
Investment in unconsolidated subsidiary | 0 |  |
Capital expenditures for property and equipment | (16,828) | (32,291) | (53,792)
Long-term loans and advances to affiliates | 0 | 0 | 0
Other | 9,763 | 1,821 | 21,390
Net cash used in investing activities | (11,137) | (91,306) | (70,691)
Cash flows from financing activities |  |  |
Borrowings under credit facility due to acquisitions | 0 |  |
Borrowings under credit facility | 0 | 94,984 | 15,423
Issuance of Senior Notes | 0 |  |
Repayment of long-term debt | 0 | (120,077) | (98,415)
Long-term loans and advances to affiliates | 0 | 0 | 0
Repurchases of stock | (623) | (6,438) | (96,632)
Proceeds from stock issuance | 87,676 | 5,275 | 11,101
Other | (858) | (681) | 6,505
Net cash provided by (used in) financing activities | 86,195 | (26,937) | (162,018)
Effect of exchange rate changes on cash | (14,627) | (5,000) | (260)
Net increase in cash and cash equivalents | 125,173 | 32,670 | 36,997
Cash and cash equivalents |  |  |
Beginning of period | 109,249 | 76,579 | 39,582
End of period | 234,422 | 109,249 | 76,579
Reportable Legal Entities | FET Inc. (Parent) |  |  |
Condensed Cash Flow Statements, Captions [Line Items] |  |  |
Cash flows from (used in) operating activities | (16,882) | (17,306) | (16,796)
Cash flows from investing activities |  |  |
Acquisition of businesses, net of cash acquired | 0 | 0 | 0
Investment in unconsolidated subsidiary | 0 |  |
Capital expenditures for property and equipment | 0 | 0 | 0
Long-term loans and advances to affiliates | (69,340) | 38,019 | 191,290
Other | 0 | 0 | 0
Net cash used in investing activities | (69,340) | 38,019 | 191,290
Cash flows from financing activities |  |  |
Borrowings under credit facility due to acquisitions | 0 |  |
Borrowings under credit facility | 0 | 94,984 | 15,000
Issuance of Senior Notes | 0 |  |
Repayment of long-term debt | 0 | (120,077) | (98,406)
Long-term loans and advances to affiliates | 0 | 0 | 0
Repurchases of stock | (623) | (6,438) | (96,632)
Proceeds from stock issuance | 87,676 | 5,275 | 11,101
Other | (766) | (8) | (6)
Net cash provided by (used in) financing activities | 86,287 | (26,264) | (168,943)
Effect of exchange rate changes on cash | 0 | 0 | 0
Net increase in cash and cash equivalents | 65 | (5,551) | 5,551
Cash and cash equivalents |  |  |
Beginning of period | 0 | 5,551 | 0
End of period | 65 | 0 | 5,551
Reportable Legal Entities | Guarantor Subsidiaries |  |  |
Condensed Cash Flow Statements, Captions [Line Items] |  |  |
Cash flows from (used in) operating activities | 31,055 | 112,629 | 175,700
Cash flows from investing activities |  |  |
Acquisition of businesses, net of cash acquired | (4,072) | (60,836) | 0
Investment in unconsolidated subsidiary | 0 |  |
Capital expenditures for property and equipment | (12,033) | (23,035) | (42,334)
Long-term loans and advances to affiliates | 12,912 | 41,755 | 34,010
Other | 9,442 | 1,057 | 20,862
Net cash used in investing activities | 6,249 | (41,059) | 12,538
Cash flows from financing activities |  |  |
Borrowings under credit facility due to acquisitions | 0 |  |
Borrowings under credit facility | 0 | 0 | 423
Issuance of Senior Notes | 0 |  |
Repayment of long-term debt | 0 | 0 | 124
Long-term loans and advances to affiliates | 69,340 | (38,019) | (191,290)
Repurchases of stock | 0 | 0 | 0
Proceeds from stock issuance | 0 | 0 | 0
Other | (253) | (673) | 6,511
Net cash provided by (used in) financing activities | 69,087 | (38,692) | (184,232)
Effect of exchange rate changes on cash | 0 | 0 | 0
Net increase in cash and cash equivalents | 106,391 | 32,878 | 4,006
Cash and cash equivalents |  |  |
Beginning of period | 36,884 | 4,006 | 0
End of period | 143,275 | 36,884 | 4,006
Reportable Legal Entities | Non-Guarantor Subsidiaries |  |  |
Condensed Cash Flow Statements, Captions [Line Items] |  |  |
Cash flows from (used in) operating activities | 73,772 | 60,590 | 111,062
Cash flows from investing activities |  |  |
Acquisition of businesses, net of cash acquired | 0 | 0 | (38,289)
Investment in unconsolidated subsidiary | 0 |  |
Capital expenditures for property and equipment | (4,795) | (9,256) | (11,458)
Long-term loans and advances to affiliates | 0 | 0 | 0
Other | 321 | 764 | 528
Net cash used in investing activities | (4,474) | (8,492) | (49,219)
Cash flows from financing activities |  |  |
Borrowings under credit facility due to acquisitions | 0 |  |
Borrowings under credit facility | 0 | 0 | 0
Issuance of Senior Notes | 0 |  |
Repayment of long-term debt | 0 | 0 | (133)
Long-term loans and advances to affiliates | (12,912) | (41,755) | (34,010)
Dividend paid to affiliates | (23,203) |  |
Repurchases of stock | 0 | 0 | 0
Proceeds from stock issuance | 0 | 0 | 0
Other | 161 | 0 | 0
Net cash provided by (used in) financing activities | (35,954) | (41,755) | (34,143)
Effect of exchange rate changes on cash | (14,627) | (5,000) | (260)
Net increase in cash and cash equivalents | 18,717 | 5,343 | 27,440
Cash and cash equivalents |  |  |
Beginning of period | 72,365 | 67,022 | 39,582
End of period | 91,082 | 72,365 | 67,022
Eliminations |  |  |
Condensed Cash Flow Statements, Captions [Line Items] |  |  |
Cash flows from (used in) operating activities | (23,203) | 0 | 0
Cash flows from investing activities |  |  |
Acquisition of businesses, net of cash acquired | 0 | 0 | 0
Investment in unconsolidated subsidiary | 0 |  |
Capital expenditures for property and equipment | 0 | 0 | 0
Long-term loans and advances to affiliates | 56,428 | (79,774) | (225,300)
Other | 0 | 0 | 0
Net cash used in investing activities | 56,428 | (79,774) | (225,300)
Cash flows from financing activities |  |  |
Borrowings under credit facility due to acquisitions | 0 |  |
Borrowings under credit facility | 0 | 0 | 0
Issuance of Senior Notes | 0 |  |
Repayment of long-term debt | 0 | 0 | 0
Long-term loans and advances to affiliates | (56,428) | 79,774 | 225,300
Dividend paid to affiliates | 23,203 |  |
Repurchases of stock | 0 | 0 | 0
Proceeds from stock issuance | 0 | 0 | 0
Other | 0 | 0 | 0
Net cash provided by (used in) financing activities | (33,225) | 79,774 | 225,300
Effect of exchange rate changes on cash | 0 | 0 | 0
Net increase in cash and cash equivalents | 0 | 0 | 0
Cash and cash equivalents |  |  |
Beginning of period | 0 | 0 | 0
End of period | $ 0 | $ 0 | $ 0

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