SUPPLEMENTAL CONDENSED CONSOLIDATING FINANCIAL INFORMATION BS (Details) - USD ($)
$ in Thousands |
Sep. 30, 2015 |
Mar. 31, 2015 |
Sep. 30, 2014 |
Mar. 31, 2014 |
| Condensed Financial Statements, Captions [Line Items] |
|
|
|
|
| Cash and cash equivalents |
$ 139,341
|
$ 104,146
|
$ 263,910
|
$ 204,341
|
| Accounts receivable |
231,785
|
258,618
|
|
|
| Inventories |
145,731
|
147,169
|
|
|
| Assets held for sale |
41,242
|
57,827
|
|
|
| Prepaid expenses and other current assets |
75,906
|
70,091
|
|
|
| Total current assets |
634,005
|
637,851
|
|
|
| Intercompany investment |
0
|
0
|
|
|
| Investment in unconsolidated affiliates |
196,350
|
216,376
|
|
|
| Intercompany notes receivable |
0
|
0
|
|
|
| Property and equipment, at cost |
2,682,730
|
2,665,828
|
|
|
| Less - Accumulated depreciation and amortization |
(527,140)
|
(508,727)
|
|
|
| Property, plant and equipment, net |
2,155,590
|
2,157,101
|
|
|
| Goodwill |
52,404
|
75,628
|
|
|
| Other assets |
162,703
|
143,764
|
|
|
| Total assets |
3,201,052
|
3,230,720
|
|
|
| Current liabilities: |
|
|
|
|
| Accounts payable |
108,678
|
84,193
|
|
|
| Accrued liabilities |
227,302
|
258,445
|
|
|
| Current deferred taxes |
15,108
|
17,704
|
|
|
| Short-term borrowings and current maturities of long-term debt |
30,041
|
18,730
|
|
|
| Deferred sale leaseback |
0
|
55,934
|
|
|
| Total current liabilities |
381,129
|
435,006
|
|
|
| Long-term debt, less current maturities |
973,339
|
845,692
|
|
|
| Intercompany notes payable |
0
|
0
|
|
|
| Accrued pension liabilities |
91,908
|
99,576
|
|
|
| Other liabilities and deferred credits |
26,942
|
39,782
|
|
|
| Deferred taxes |
150,172
|
165,655
|
|
|
| Redeemable noncontrolling interests |
30,527
|
26,223
|
|
|
| Common stock |
377
|
376
|
|
|
| Additional paid-in-capital |
788,672
|
781,837
|
|
|
| Retained earnings |
1,208,809
|
1,284,442
|
|
|
| Accumulated other comprehensive income (loss) |
(274,100)
|
(270,329)
|
|
|
| Treasury shares |
(184,796)
|
(184,796)
|
|
|
| Total Bristow Group stockholders' investment |
1,538,962
|
1,611,530
|
|
|
| Noncontrolling interests |
8,073
|
7,256
|
|
|
| Total stockholders' investment |
1,547,035
|
1,618,786
|
|
|
| Total liabilities, redeemable noncontrolling interests and stockholders' investment |
3,201,052
|
3,230,720
|
|
|
| Parent Company |
|
|
|
|
| Condensed Financial Statements, Captions [Line Items] |
|
|
|
|
| Cash and cash equivalents |
20,080
|
126
|
54,476
|
4,640
|
| Accounts receivable |
408,430
|
377,158
|
|
|
| Inventories |
8
|
0
|
|
|
| Assets held for sale |
0
|
0
|
|
|
| Prepaid expenses and other current assets |
4,686
|
4,850
|
|
|
| Total current assets |
433,204
|
382,134
|
|
|
| Intercompany investment |
1,196,923
|
1,410,347
|
|
|
| Investment in unconsolidated affiliates |
0
|
0
|
|
|
| Intercompany notes receivable |
1,279,069
|
1,184,335
|
|
|
| Property and equipment, at cost |
129,966
|
111,287
|
|
|
| Less - Accumulated depreciation and amortization |
(19,708)
|
(16,431)
|
|
|
| Property, plant and equipment, net |
110,258
|
94,856
|
|
|
| Goodwill |
0
|
0
|
|
|
| Other assets |
176,270
|
43,423
|
|
|
| Total assets |
3,195,724
|
3,115,095
|
|
|
| Current liabilities: |
|
|
|
|
| Accounts payable |
329,595
|
203,700
|
|
|
| Accrued liabilities |
20,210
|
31,805
|
|
|
| Current deferred taxes |
1,986
|
(3,661)
|
|
|
| Short-term borrowings and current maturities of long-term debt |
21,001
|
9,088
|
|
|
| Deferred sale leaseback |
|
0
|
|
|
| Total current liabilities |
372,792
|
240,932
|
|
|
| Long-term debt, less current maturities |
946,946
|
812,536
|
|
|
| Intercompany notes payable |
0
|
100,000
|
|
|
| Accrued pension liabilities |
0
|
0
|
|
|
| Other liabilities and deferred credits |
9,710
|
17,144
|
|
|
| Deferred taxes |
139,201
|
141,771
|
|
|
| Redeemable noncontrolling interests |
0
|
0
|
|
|
| Common stock |
377
|
376
|
|
|
| Additional paid-in-capital |
788,672
|
781,837
|
|
|
| Retained earnings |
1,208,809
|
1,284,442
|
|
|
| Accumulated other comprehensive income (loss) |
(87,475)
|
(80,604)
|
|
|
| Treasury shares |
(184,796)
|
(184,796)
|
|
|
| Total Bristow Group stockholders' investment |
1,725,587
|
1,801,255
|
|
|
| Noncontrolling interests |
1,488
|
1,457
|
|
|
| Total stockholders' investment |
1,727,075
|
1,802,712
|
|
|
| Total liabilities, redeemable noncontrolling interests and stockholders' investment |
3,195,724
|
3,115,095
|
|
|
| Guarantor Subsidiaries |
|
|
|
|
| Condensed Financial Statements, Captions [Line Items] |
|
|
|
|
| Cash and cash equivalents |
1,153
|
884
|
13,768
|
0
|
| Accounts receivable |
490,607
|
342,239
|
|
|
| Inventories |
39,943
|
44,285
|
|
|
| Assets held for sale |
29,896
|
54,695
|
|
|
| Prepaid expenses and other current assets |
5,432
|
7,035
|
|
|
| Total current assets |
567,031
|
449,138
|
|
|
| Intercompany investment |
111,379
|
111,380
|
|
|
| Investment in unconsolidated affiliates |
0
|
0
|
|
|
| Intercompany notes receivable |
13,786
|
0
|
|
|
| Property and equipment, at cost |
1,126,657
|
1,165,164
|
|
|
| Less - Accumulated depreciation and amortization |
(228,681)
|
(223,245)
|
|
|
| Property, plant and equipment, net |
897,976
|
941,919
|
|
|
| Goodwill |
4,756
|
4,756
|
|
|
| Other assets |
893
|
988
|
|
|
| Total assets |
1,595,821
|
1,508,181
|
|
|
| Current liabilities: |
|
|
|
|
| Accounts payable |
536,606
|
369,854
|
|
|
| Accrued liabilities |
37,915
|
37,860
|
|
|
| Current deferred taxes |
1,922
|
2,503
|
|
|
| Short-term borrowings and current maturities of long-term debt |
0
|
0
|
|
|
| Deferred sale leaseback |
|
55,934
|
|
|
| Total current liabilities |
576,443
|
466,151
|
|
|
| Long-term debt, less current maturities |
0
|
0
|
|
|
| Intercompany notes payable |
116,846
|
131,075
|
|
|
| Accrued pension liabilities |
0
|
0
|
|
|
| Other liabilities and deferred credits |
7,443
|
8,379
|
|
|
| Deferred taxes |
5,380
|
6,346
|
|
|
| Redeemable noncontrolling interests |
0
|
0
|
|
|
| Common stock |
4,996
|
4,996
|
|
|
| Additional paid-in-capital |
9,291
|
9,291
|
|
|
| Retained earnings |
875,422
|
881,943
|
|
|
| Accumulated other comprehensive income (loss) |
0
|
0
|
|
|
| Treasury shares |
0
|
0
|
|
|
| Total Bristow Group stockholders' investment |
889,709
|
896,230
|
|
|
| Noncontrolling interests |
0
|
0
|
|
|
| Total stockholders' investment |
889,709
|
896,230
|
|
|
| Total liabilities, redeemable noncontrolling interests and stockholders' investment |
1,595,821
|
1,508,181
|
|
|
| Non-Guarantor Subsidiaries |
|
|
|
|
| Condensed Financial Statements, Captions [Line Items] |
|
|
|
|
| Cash and cash equivalents |
118,108
|
103,136
|
195,666
|
200,147
|
| Accounts receivable |
371,400
|
447,776
|
|
|
| Inventories |
105,780
|
102,884
|
|
|
| Assets held for sale |
11,346
|
3,132
|
|
|
| Prepaid expenses and other current assets |
65,788
|
58,206
|
|
|
| Total current assets |
672,422
|
715,134
|
|
|
| Intercompany investment |
152,990
|
0
|
|
|
| Investment in unconsolidated affiliates |
196,350
|
216,376
|
|
|
| Intercompany notes receivable |
0
|
0
|
|
|
| Property and equipment, at cost |
1,426,107
|
1,389,377
|
|
|
| Less - Accumulated depreciation and amortization |
(278,751)
|
(269,051)
|
|
|
| Property, plant and equipment, net |
1,147,356
|
1,120,326
|
|
|
| Goodwill |
47,648
|
70,872
|
|
|
| Other assets |
90,532
|
99,353
|
|
|
| Total assets |
2,307,298
|
2,222,061
|
|
|
| Current liabilities: |
|
|
|
|
| Accounts payable |
347,618
|
289,838
|
|
|
| Accrued liabilities |
1,230,505
|
206,789
|
|
|
| Current deferred taxes |
11,200
|
18,862
|
|
|
| Short-term borrowings and current maturities of long-term debt |
9,040
|
9,642
|
|
|
| Deferred sale leaseback |
|
0
|
|
|
| Total current liabilities |
1,598,363
|
525,131
|
|
|
| Long-term debt, less current maturities |
26,393
|
33,156
|
|
|
| Intercompany notes payable |
154,663
|
1,065,918
|
|
|
| Accrued pension liabilities |
91,908
|
99,576
|
|
|
| Other liabilities and deferred credits |
9,789
|
21,711
|
|
|
| Deferred taxes |
5,591
|
17,538
|
|
|
| Redeemable noncontrolling interests |
30,527
|
26,223
|
|
|
| Common stock |
22,876
|
22,876
|
|
|
| Additional paid-in-capital |
284,048
|
284,048
|
|
|
| Retained earnings |
49,155
|
133,559
|
|
|
| Accumulated other comprehensive income (loss) |
27,400
|
(13,474)
|
|
|
| Treasury shares |
0
|
0
|
|
|
| Total Bristow Group stockholders' investment |
383,479
|
427,009
|
|
|
| Noncontrolling interests |
6,585
|
5,799
|
|
|
| Total stockholders' investment |
390,064
|
432,808
|
|
|
| Total liabilities, redeemable noncontrolling interests and stockholders' investment |
2,307,298
|
2,222,061
|
|
|
| Consolidations, Eliminations |
|
|
|
|
| Condensed Financial Statements, Captions [Line Items] |
|
|
|
|
| Cash and cash equivalents |
0
|
0
|
$ 0
|
$ (446)
|
| Accounts receivable |
(1,038,652)
|
(908,555)
|
|
|
| Inventories |
0
|
0
|
|
|
| Assets held for sale |
0
|
0
|
|
|
| Prepaid expenses and other current assets |
0
|
0
|
|
|
| Total current assets |
(1,038,652)
|
(908,555)
|
|
|
| Intercompany investment |
(1,461,292)
|
(1,521,727)
|
|
|
| Investment in unconsolidated affiliates |
0
|
0
|
|
|
| Intercompany notes receivable |
(1,292,855)
|
(1,184,335)
|
|
|
| Property and equipment, at cost |
0
|
0
|
|
|
| Less - Accumulated depreciation and amortization |
0
|
0
|
|
|
| Property, plant and equipment, net |
0
|
0
|
|
|
| Goodwill |
0
|
0
|
|
|
| Other assets |
(104,992)
|
0
|
|
|
| Total assets |
(3,897,791)
|
(3,614,617)
|
|
|
| Current liabilities: |
|
|
|
|
| Accounts payable |
(1,105,141)
|
(779,199)
|
|
|
| Accrued liabilities |
(1,061,328)
|
(18,009)
|
|
|
| Current deferred taxes |
0
|
0
|
|
|
| Short-term borrowings and current maturities of long-term debt |
0
|
0
|
|
|
| Deferred sale leaseback |
|
0
|
|
|
| Total current liabilities |
(2,166,469)
|
(797,208)
|
|
|
| Long-term debt, less current maturities |
0
|
0
|
|
|
| Intercompany notes payable |
(271,509)
|
(1,296,993)
|
|
|
| Accrued pension liabilities |
0
|
0
|
|
|
| Other liabilities and deferred credits |
0
|
(7,452)
|
|
|
| Deferred taxes |
0
|
0
|
|
|
| Redeemable noncontrolling interests |
0
|
0
|
|
|
| Common stock |
(27,872)
|
(27,872)
|
|
|
| Additional paid-in-capital |
(293,339)
|
(293,339)
|
|
|
| Retained earnings |
(924,577)
|
(1,015,502)
|
|
|
| Accumulated other comprehensive income (loss) |
(214,025)
|
(176,251)
|
|
|
| Treasury shares |
0
|
0
|
|
|
| Total Bristow Group stockholders' investment |
(1,459,813)
|
(1,512,964)
|
|
|
| Noncontrolling interests |
0
|
0
|
|
|
| Total stockholders' investment |
(1,459,813)
|
(1,512,964)
|
|
|
| Total liabilities, redeemable noncontrolling interests and stockholders' investment |
(3,897,791)
|
(3,614,617)
|
|
|
| Land and Building |
|
|
|
|
| Condensed Financial Statements, Captions [Line Items] |
|
|
|
|
| Property and equipment, at cost |
237,704
|
171,959
|
|
|
| Land and Building | Parent Company |
|
|
|
|
| Condensed Financial Statements, Captions [Line Items] |
|
|
|
|
| Property and equipment, at cost |
4,539
|
2,830
|
|
|
| Land and Building | Guarantor Subsidiaries |
|
|
|
|
| Condensed Financial Statements, Captions [Line Items] |
|
|
|
|
| Property and equipment, at cost |
60,858
|
50,946
|
|
|
| Land and Building | Non-Guarantor Subsidiaries |
|
|
|
|
| Condensed Financial Statements, Captions [Line Items] |
|
|
|
|
| Property and equipment, at cost |
172,307
|
118,183
|
|
|
| Land and Building | Consolidations, Eliminations |
|
|
|
|
| Condensed Financial Statements, Captions [Line Items] |
|
|
|
|
| Property and equipment, at cost |
0
|
0
|
|
|
| Aircraft And Equipment |
|
|
|
|
| Condensed Financial Statements, Captions [Line Items] |
|
|
|
|
| Property and equipment, at cost |
2,445,026
|
2,493,869
|
|
|
| Aircraft And Equipment | Parent Company |
|
|
|
|
| Condensed Financial Statements, Captions [Line Items] |
|
|
|
|
| Property and equipment, at cost |
125,427
|
108,457
|
|
|
| Aircraft And Equipment | Guarantor Subsidiaries |
|
|
|
|
| Condensed Financial Statements, Captions [Line Items] |
|
|
|
|
| Property and equipment, at cost |
1,065,799
|
1,114,218
|
|
|
| Aircraft And Equipment | Non-Guarantor Subsidiaries |
|
|
|
|
| Condensed Financial Statements, Captions [Line Items] |
|
|
|
|
| Property and equipment, at cost |
1,253,800
|
1,271,194
|
|
|
| Aircraft And Equipment | Consolidations, Eliminations |
|
|
|
|
| Condensed Financial Statements, Captions [Line Items] |
|
|
|
|
| Property and equipment, at cost |
$ 0
|
$ 0
|
|
|