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Note 13 - Guarantor Subsidiaries - Unaudited Interim Condensed Consolidating Statements of Cash Flows (Details) - USD ($) $ in Thousands | 9 Months Ended
--- | ---
Sep. 30, 2017 | Sep. 30, 2016
Cash flows from operating activities | $ 74,115 | $ 173,114
Additions to properties, plants, and equipment | (70,390) | (120,236)
Other investing activities, net | 1,156 | (29,159)
Dividends paid to shareholders | (3,392) | (3,296)
Proceeds from (payments on) debt | (5,535) | (8,135)
Other financing activity, net | 6,141 | 3,651
Effect of exchange rates on cash | 1,051 | 627
Changes in cash and cash equivalents | 3,146 | 12,635
Cash and cash equivalents at beginning of period | 169,777 | 155,209
Cash and cash equivalents at end of period | 172,923 | 167,844
Acquisitions of other companies, net of cash acquired |  | (3,931)
Consolidation, Eliminations [Member] |  |
Cash flows from operating activities | (24,155) | 45,280
Additions to properties, plants, and equipment |  |
Other investing activities, net | (5,339) |
Dividends paid to shareholders |  |
Proceeds from (payments on) debt |  |
Other financing activity, net | 29,494 | (45,280)
Effect of exchange rates on cash |  |
Changes in cash and cash equivalents |  |
Cash and cash equivalents at beginning of period |  |
Cash and cash equivalents at end of period |  |
Acquisitions of other companies, net of cash acquired |  |
Parent Company [Member] | Reportable Legal Entities [Member] |  |
Cash flows from operating activities | 35,764 | 14,525
Additions to properties, plants, and equipment |  | (348)
Other investing activities, net | 176 | (24,696)
Dividends paid to shareholders | (3,392) | (3,296)
Proceeds from (payments on) debt |  |
Other financing activity, net | (44,762) | 33,335
Effect of exchange rates on cash |  |
Changes in cash and cash equivalents | (12,214) | 15,589
Cash and cash equivalents at beginning of period | 113,275 | 94,167
Cash and cash equivalents at end of period | 101,061 | 109,756
Acquisitions of other companies, net of cash acquired |  | (3,931)
Guarantor Subsidiaries [Member] | Reportable Legal Entities [Member] |  |
Cash flows from operating activities | 41,071 | 51,599
Additions to properties, plants, and equipment | (28,220) | (71,265)
Other investing activities, net | 6,903 | (816)
Dividends paid to shareholders |  |
Proceeds from (payments on) debt | (4,518) | (7,477)
Other financing activity, net | (21,500) | 24,522
Effect of exchange rates on cash |  |
Changes in cash and cash equivalents | (6,264) | (3,437)
Cash and cash equivalents at beginning of period | 24,388 | 42,692
Cash and cash equivalents at end of period | 18,124 | 39,255
Acquisitions of other companies, net of cash acquired |  |
Non-Guarantor Subsidiaries [Member] | Reportable Legal Entities [Member] |  |
Cash flows from operating activities | 21,435 | 61,710
Additions to properties, plants, and equipment | (42,170) | (48,623)
Other investing activities, net | (584) | (3,647)
Dividends paid to shareholders |  |
Proceeds from (payments on) debt | (1,017) | (658)
Other financing activity, net | 42,909 | (8,926)
Effect of exchange rates on cash | 1,051 | 627
Changes in cash and cash equivalents | 21,624 | 483
Cash and cash equivalents at beginning of period | 32,114 | 18,350
Cash and cash equivalents at end of period | $ 53,738 | 18,833
Acquisitions of other companies, net of cash acquired |  |

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- Definition Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=82887183&loc=d3e6676-107765 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3044-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.1) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Amount of increase (decrease) in cash and cash equivalents. Cash and cash equivalents are the amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Includes effect from exchange rate changes. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 24 -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3521-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 230 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=98513438&loc=d3e33268-110906 + Details
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- Definition Amount of cash inflow (outflow) from operating activities, including discontinued operations. Operating activity cash flows include transactions, adjustments, and changes in value not defined as investing or financing activities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 24 -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3521-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 25 -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3536-108585 + Details
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