Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001564590-19-004521-index-headers.html | 2019-02-26 17:25:51 | |
| 0001564590-19-004521-index.html | 2019-02-26 17:25:51 | |
| 0001564590-19-004521.txt | 2019-02-26 17:25:51 | |
 0001564590-19-004521-xbrl.zip | 219216 | 2019-02-26 17:25:51 |
| FilingSummary.xml | 56916 | 2019-02-26 17:25:51 |
| Financial_Report.xlsx | 108174 | 2019-02-26 17:25:51 |
 g10bcf1msf4u000001.jpg | 4792 | 2019-02-26 17:25:51 |
 g10bcf1msf4u000002.jpg | 35561 | 2019-02-26 17:25:51 |
| gldd-10k_20181231.htm | 4497320 | 2019-02-26 17:25:51 |
| gldd-20181231.xml | 3095713 | 2019-02-26 17:25:51 |
| gldd-20181231.xsd | 79273 | 2019-02-26 17:25:51 |
| gldd-20181231_cal.xml | 118333 | 2019-02-26 17:25:51 |
| gldd-20181231_def.xml | 250660 | 2019-02-26 17:25:51 |
| gldd-20181231_lab.xml | 631129 | 2019-02-26 17:25:51 |
| gldd-20181231_pre.xml | 506186 | 2019-02-26 17:25:51 |
| gldd-ex211_9.htm | 23875 | 2019-02-26 17:25:51 |
| gldd-ex231_18.htm | 3070 | 2019-02-26 17:25:51 |
| gldd-ex311_7.htm | 16091 | 2019-02-26 17:25:51 |
| gldd-ex312_16.htm | 16097 | 2019-02-26 17:25:51 |
| gldd-ex321_12.htm | 7423 | 2019-02-26 17:25:51 |
| gldd-ex322_11.htm | 7297 | 2019-02-26 17:25:51 |
| R1.htm | 35607 | 2019-02-26 17:25:51 |
| R10.htm | 37075 | 2019-02-26 17:25:51 |
| R11.htm | 105387 | 2019-02-26 17:25:51 |
| R12.htm | 46352 | 2019-02-26 17:25:51 |
| R13.htm | 40728 | 2019-02-26 17:25:51 |
| R14.htm | 65390 | 2019-02-26 17:25:51 |
| R15.htm | 189632 | 2019-02-26 17:25:51 |
| R16.htm | 262566 | 2019-02-26 17:25:51 |
| R17.htm | 94898 | 2019-02-26 17:25:51 |
| R18.htm | 262895 | 2019-02-26 17:25:51 |
| R19.htm | 7614 | 2019-02-26 17:25:51 |
| R2.htm | 94281 | 2019-02-26 17:25:51 |
| R20.htm | 38678 | 2019-02-26 17:25:51 |
| R21.htm | 31011 | 2019-02-26 17:25:51 |
| R22.htm | 5733 | 2019-02-26 17:25:51 |
| R23.htm | 127063 | 2019-02-26 17:25:51 |
| R24.htm | 141570 | 2019-02-26 17:25:51 |
| R25.htm | 72062 | 2019-02-26 17:25:51 |
| R26.htm | 10531 | 2019-02-26 17:25:51 |
| R27.htm | 109039 | 2019-02-26 17:25:51 |
| R28.htm | 44954 | 2019-02-26 17:25:51 |
| R29.htm | 40167 | 2019-02-26 17:25:51 |
| R3.htm | 10713 | 2019-02-26 17:25:51 |
| R30.htm | 56486 | 2019-02-26 17:25:51 |
| R31.htm | 183124 | 2019-02-26 17:25:51 |
| R32.htm | 262877 | 2019-02-26 17:25:51 |
| R33.htm | 89687 | 2019-02-26 17:25:51 |
| R34.htm | 259022 | 2019-02-26 17:25:51 |
| R35.htm | 37141 | 2019-02-26 17:25:51 |
| R36.htm | 20068 | 2019-02-26 17:25:51 |
| R37.htm | 126680 | 2019-02-26 17:25:51 |
| R38.htm | 18386 | 2019-02-26 17:25:51 |
| R39.htm | 16904 | 2019-02-26 17:25:51 |
| R4.htm | 79163 | 2019-02-26 17:25:51 |
| R40.htm | 29761 | 2019-02-26 17:25:51 |
| R41.htm | 4205 | 2019-02-26 17:25:51 |
| R42.htm | 5027 | 2019-02-26 17:25:51 |
| R43.htm | 18845 | 2019-02-26 17:25:51 |
| R44.htm | 9988 | 2019-02-26 17:25:51 |
| R45.htm | 23445 | 2019-02-26 17:25:51 |
| R46.htm | 21209 | 2019-02-26 17:25:51 |
| R47.htm | 6090 | 2019-02-26 17:25:51 |
| R48.htm | 108259 | 2019-02-26 17:25:51 |
| R49.htm | 8929 | 2019-02-26 17:25:51 |
| R5.htm | 18983 | 2019-02-26 17:25:51 |
| R50.htm | 7928 | 2019-02-26 17:25:51 |
| R51.htm | 35456 | 2019-02-26 17:25:51 |
| R52.htm | 12900 | 2019-02-26 17:25:51 |
| R53.htm | 18636 | 2019-02-26 17:25:51 |
| R54.htm | 21633 | 2019-02-26 17:25:51 |
| R55.htm | 11780 | 2019-02-26 17:25:51 |
| R56.htm | 9331 | 2019-02-26 17:25:51 |
| R57.htm | 17076 | 2019-02-26 17:25:51 |
| R58.htm | 46556 | 2019-02-26 17:25:51 |
| R59.htm | 27049 | 2019-02-26 17:25:51 |
| R6.htm | 8217 | 2019-02-26 17:25:51 |
| R60.htm | 7267 | 2019-02-26 17:25:51 |
| R61.htm | 31615 | 2019-02-26 17:25:51 |
| R62.htm | 48681 | 2019-02-26 17:25:51 |
| R63.htm | 31061 | 2019-02-26 17:25:51 |
| R64.htm | 27316 | 2019-02-26 17:25:51 |
| R65.htm | 24934 | 2019-02-26 17:25:51 |
| R66.htm | 30144 | 2019-02-26 17:25:51 |
| R67.htm | 43492 | 2019-02-26 17:25:51 |
| R68.htm | 19670 | 2019-02-26 17:25:51 |
| R69.htm | 17702 | 2019-02-26 17:25:51 |
| R7.htm | 46449 | 2019-02-26 17:25:51 |
| R70.htm | 20221 | 2019-02-26 17:25:51 |
| R71.htm | 23758 | 2019-02-26 17:25:51 |
| R72.htm | 12730 | 2019-02-26 17:25:51 |
| R73.htm | 12669 | 2019-02-26 17:25:51 |
| R74.htm | 16575 | 2019-02-26 17:25:51 |
| R75.htm | 16060 | 2019-02-26 17:25:51 |
| R76.htm | 33872 | 2019-02-26 17:25:51 |
| R77.htm | 19392 | 2019-02-26 17:25:51 |
| R78.htm | 17037 | 2019-02-26 17:25:51 |
| R79.htm | 16740 | 2019-02-26 17:25:51 |
| R8.htm | 137658 | 2019-02-26 17:25:51 |
| R80.htm | 20568 | 2019-02-26 17:25:51 |
| R81.htm | 53329 | 2019-02-26 17:25:51 |
| R82.htm | 15654 | 2019-02-26 17:25:51 |
| R9.htm | 4352 | 2019-02-26 17:25:51 |
| report.css | 2768 | 2019-02-26 17:25:51 |
| Show.js | 1085 | 2019-02-26 17:25:51 |