Long-Term Debt and Notes Payable - Additional Information 2 (Detail) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended								3 Months Ended		3 Months Ended	9 Months Ended	12 Months Ended
	Mar. 31, 2014	Mar. 31, 2014 Reimbursement Agreement [Member]	Dec. 31, 2013 Reimbursement Agreement [Member]	Apr. 20, 2012 ANZ Reimbursement Agreement [Member]	Mar. 31, 2014 Mexico [Member]	Dec. 31, 2013 Mexico [Member]	Mar. 31, 2014 Brazil [Member]	Dec. 31, 2013 Brazil [Member]	Mar. 31, 2014 North Ocean Construction Financing [Member] North Ocean 102 [Member]	Dec. 31, 2013 North Ocean Construction Financing [Member] North Ocean 102 [Member]	Mar. 31, 2014 Senior Notes [Member]	Sep. 30, 2010 Secured Debt [Member] North Ocean Construction Financing [Member] North Ocean 105 [Member]	Dec. 31, 2013 Secured Debt [Member] North Ocean Construction Financing [Member] North Ocean 105 [Member]	Mar. 31, 2014 Secured Debt [Member] North Ocean Construction Financing [Member] North Ocean 105 [Member] Installment	Mar. 31, 2014 Secured Debt [Member] North Ocean Construction Financing [Member] North Ocean 105 [Member] Maximum [Member]
Debt Instrument [Line Items]
Aggregate principal amount of debt issued											$ 500.0
Debt instrument interest rate											8.00%	2.76%
Debt instrument maturity date	Apr. 01, 2017										May 01, 2021
Units issued	11,500,000
Tangible units interest rate percentage	6.25%
Unit price per share	25.00
Initial principal amount per amortizing note	4.1266
Amortizing note interest rate percentage	7.75%
Maximum settlement rate per tangible equity unit	$ 3.5562
Notes payable										31.4
Notes payable, current										31.4			8.2	8.2
Debt description									The outstanding debt bore interest at a rate equal to the three-month LIBOR (which was subject to reset every three months) plus a margin of 3.315%. JRMSA paid in full the approximately $31.4 million notes payable balance upon maturity during January 2014.
Applicable margin for LIBOR borrowing									3.315%
Debt maturity date									2014-01
Percentage of debt guaranteed by JRMSA									50.00%
Repayments of notes payable by JRMSA									31.4
Ownership percentage in Oceanteam ASA's									50.00%
Secured debt															69.4
Business acquisition percentage, interests acquired														75.00%
Principal repayment	April 16, 2016												The agreement provides for borrowings of up to $69.4 million, bearing interest at 2.76% per year, and requires principal repayment in 17 consecutive semi-annual installments, which commenced on October 1, 2012.
Number of consecutive semi-annual installments														17
Borrowing outstanding													57.2	57.2
Bank guarantees issued		56.2	55.8
Letters of credit outstanding amount	376.0	23.3	26.0	109.0
Bonds issued related to JRMSA general agreement of indemnity					$ 42.1	$ 43.5	$ 111.2	$ 106.3