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Note 16 - Guarantor Subsidiaries - Unaudited Interim Condensed Consolidating Statements of Cash Flows (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Cash flows from operating activities | $ 115,878 | $ 225,328 | $ 106,445
Additions to properties, plants, and equipment | (98,038) | (164,788) | (137,443)
Other investing activities, net | 2,643 | (29,946) | (1,163)
Dividends paid to stockholders | (4,528) | (4,419) | (4,291)
Payments on debt | (6,986) | (11,156) | (10,851)
Other financing activity | 6,266 | 3,554 | (2,001)
Effect of exchange rate changes on cash | 1,095 | (74) | (5,152)
Changes in cash and cash equivalents | 16,330 | 14,568 | (54,456)
Cash and cash equivalents at beginning of year | 169,777 | 155,209 | 209,665
Purchase of other companies, net of cash acquired |  | (3,931) | (809)
Dividends paid to stockholders | (4,528) | (4,419) | (4,291)
Payments on debt | (6,986) | (11,156) | (10,851)
Consolidation, Eliminations [Member] |  |  |
Cash flows from operating activities | 228,797 | (19,606) | (2,629)
Additions to properties, plants, and equipment |  |  |
Other investing activities, net | (138,762) |  |
Dividends paid to stockholders |  |  |
Payments on debt |  |  |
Other financing activity | (90,035) | 19,606 | 2,629
Effect of exchange rate changes on cash |  |  |
Changes in cash and cash equivalents |  |  |
Cash and cash equivalents at beginning of year |  |  |
Purchase of other companies, net of cash acquired |  |  |
Dividends paid to stockholders |  |  |
Payments on debt |  |  |
Parent Company [Member] | Reportable Legal Entities [Member] |  |  |
Cash flows from operating activities | (134,900) | 85,665 | (56,036)
Additions to properties, plants, and equipment |  | (348) | (1,355)
Other investing activities, net | 132,118 | (29,383) | (748)
Dividends paid to stockholders | (4,528) | (4,419) | (4,291)
Payments on debt |  |  |
Other financing activity | (2,087) | (28,476) | 9,712
Effect of exchange rate changes on cash |  |  |
Changes in cash and cash equivalents | (9,397) | 19,108 | (52,718)
Cash and cash equivalents at beginning of year | 113,275 | 94,167 | 146,885
Purchase of other companies, net of cash acquired |  | (3,931) |
Dividends paid to stockholders | (4,528) | (4,419) | (4,291)
Payments on debt |  |  |
Guarantor Subsidiaries [Member] | Reportable Legal Entities [Member] |  |  |
Cash flows from operating activities | (98,046) | 82,778 | 101,254
Additions to properties, plants, and equipment | (46,570) | (93,541) | (97,684)
Other investing activities, net | 9,287 | (896) | 637
Dividends paid to stockholders |  |  |
Payments on debt | (5,242) | (10,174) | (12,405)
Other financing activity | 147,199 | 3,529 | 17,066
Effect of exchange rate changes on cash |  |  |
Changes in cash and cash equivalents | 6,628 | (18,304) | 8,868
Cash and cash equivalents at beginning of year | 24,388 | 42,692 | 33,824
Purchase of other companies, net of cash acquired |  |  |
Dividends paid to stockholders |  |  |
Payments on debt | (5,242) | (10,174) | (12,405)
Non-Guarantor Subsidiaries [Member] | Reportable Legal Entities [Member] |  |  |
Cash flows from operating activities | 120,027 | 76,491 | 63,856
Additions to properties, plants, and equipment | (51,468) | (70,899) | (38,404)
Other investing activities, net |  | 333 | (1,052)
Dividends paid to stockholders |  |  |
Payments on debt | (1,744) | (982) | 1,554
Other financing activity | (48,811) | 8,895 | (31,408)
Effect of exchange rate changes on cash | 1,095 | (74) | (5,152)
Changes in cash and cash equivalents | 19,099 | 13,764 | (10,606)
Cash and cash equivalents at beginning of year | 32,114 | 18,350 | 28,956
Purchase of other companies, net of cash acquired |  |  |
Dividends paid to stockholders |  |  |
Payments on debt | $ (1,744) | $ (982) | $ 1,554

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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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