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Condensed Financial Information of DHT Holdings, Inc. - Cash Flow (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Cash flows from operating activities |  |  |  |  |
Profit/(loss) for the year | $ (46,927) |  | $ 6,602 |  | $ 9,260
Items included in net income not affecting cash flows |  |  |  |  |
Depreciation and amortization | 103,476 |  | 96,758 |  | 84,340
Impairment charges/(reversal of impairment charges) | 3,500 |  | 8,540 |  | 84,700
Amortization of upfront fees | 11,559 |  | 7,375 |  | 7,997
Profit/(loss), sale of vessel | (75) |  | 3,540 |  | (138)
Fair value gain/(loss) on derivative financial liabilities | 5,191 |  | (2,154) |  | (3,235)
Compensation related to options and restricted stock | 2,599 |  | 4,948 |  | 7,365
(Gain)/loss purchase convertible bond | 3,589 |  | (1,035) |  | 0
Share of profit in associated companies | (858) |  | (802) |  | (649)
Unrealized currency translation (gains)/losses | 0 |  | 0 |  | (255)
Changes in operating assets and liabilities |  |  |  |  |
Accounts receivable and accrued revenues | (25,421) |  | (9,869) |  | 7,751
Capitalized voyage expenses | 255 |  | 0 |  | 0
Prepaid expenses | (1,141) |  | 430 |  | (1,087)
Accounts payable and accrued expenses | 8,234 |  | 5,407 |  | (1,557)
Deferred shipping revenues | 0 |  | (2,154) |  | (1,422)
Bunkers, lube oils and consumables | (9,994) |  | (15,769) |  | 938
Net cash provided by operating activities | 53,985 |  | 101,817 |  | 194,008
Cash flows from investing activities |  |  |  |  |
Investment in vessels | (11,845) |  | (165,649) |  | (13,260)
Investment in vessels under constuction | (223,033) |  | (132,536) |  | (222,104)
Proceeds from sale of vessels | 46,393 |  | 111,418 |  | 22,233
Dividend received from associated company | 409 |  | 415 |  | 242
Investment in property, plant and equipment | (88) |  | (193) |  | (144)
Net cash used in investing activities | (188,165) |  | (186,545) |  | (213,033)
Cash flows from financing activities |  |  |  |  |
Cash dividends paid | (11,487) |  | (23,328) |  | (66,365)
Issuance of long term debt | 577,685 |  | 200,452 |  | 219,248
Purchase of treasury shares | (5,026) |  | 0 |  | (2,031)
Purchase of convertible bonds | 0 |  | (17,104) |  | (25,334)
Issuance of convertible bonds | 38,945 |  | 0 |  | 0
Repayment of long-term debt | (448,285) |  | (107,295) |  | (163,972)
Net cash provided by/(used in) financing activities | 151,832 |  | 52,725 |  | (38,454)
Net increase/(decrease) in cash and cash equivalents | 17,652 |  | (32,003) |  | (57,480)
Cash and cash equivalents at beginning of period | 77,292 | [1] | 109,295 |  | 166,775
Cash and cash equivalents at end of period | 94,944 | [1] | 77,292 | [1] | 109,295
Specification of items included in operating activities |  |  |  |  |
Interest paid | 40,040 |  | 32,253 |  | 27,539
Interest received | 345 |  | 140 |  | 66
Parent Company [Member] |  |  |  |  |
Cash flows from operating activities |  |  |  |  |
Profit/(loss) for the year | (86,143) |  | 20,293 |  | (5,228)
Items included in net income not affecting cash flows |  |  |  |  |
Amortization | 4,733 |  | 4,170 |  | 4,982
Impairment charges/(reversal of impairment charges) | 93,452 |  | 4,948 |  | 18,132
Compensation related to options and restricted stock | 663 |  | 4,948 |  | 7,365
(Gain)/loss purchase convertible bond | 3,589 |  | (1,035) |  | 0
Changes in operating assets and liabilities |  |  |  |  |
Accounts receivable and prepaid expenses | (125) |  | 4,305 |  | (4,148)
Accounts payable and accrued expenses | 2,279 |  | (291) |  | (148)
Amounts due to related parties | (72,365) |  | 11,782 |  | 122,401
Net cash provided by operating activities | (53,917) |  | 49,119 |  | 143,357
Cash flows from investing activities |  |  |  |  |
Investment in subsidiary, net of cash acquired | 0 |  | 0 |  | (1,022)
Loans to subsidiaries classified as investing activities | 58,990 |  | 82,814 |  | (63,985)
Investment in vessels | (21,263) |  | (86,004) |  | (32,219)
Net cash used in investing activities | 37,727 |  | (3,191) |  | (97,227)
Cash flows from financing activities |  |  |  |  |
Cash dividends paid | (11,487) |  | (23,328) |  | (66,365)
Purchase of treasury shares | (5,026) |  | 0 |  | (2,031)
Purchase of convertible bonds |  |  | (17,104) |  | (25,334)
Issuance of convertible bonds | 38,945 |  |  |  |
Net cash provided by/(used in) financing activities | 22,432 |  | (40,431) |  | (93,731)
Net increase/(decrease) in cash and cash equivalents | 6,242 |  | 5,497 |  | (47,602)
Cash and cash equivalents at beginning of period | 11,540 |  | 6,043 |  | 53,645
Cash and cash equivalents at end of period | $ 17,783 |  | $ 11,540 |  | $ 6,043
[1] | Amortized cost.

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