Sch1-BALANCE SHEET (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Cash and Cash Equivalents, at Carrying Value	$ 64,080,000	$ 53,759,000	$ 137,603,000	$ 160,566,000
Restricted Cash and Cash Equivalents, Current	42,074,000	68,363,000
Fair value	2,624,000	3,479,000
Trade accounts receivable, net	18,943,000us-gaap_AccountsReceivableNetCurrent	11,828,000us-gaap_AccountsReceivableNetCurrent
Due from Related Parties, Current	12,637,000us-gaap_DueFromRelatedPartiesCurrent	9,487,000us-gaap_DueFromRelatedPartiesCurrent
Other Receivables	16,703,000us-gaap_OtherReceivables	16,180,000us-gaap_OtherReceivables
Prepaid expenses and accrued income	3,861,000fro_PrepaidExpensesAndAccruedIncome	3,858,000fro_PrepaidExpensesAndAccruedIncome
Total current assets	233,243,000us-gaap_AssetsCurrent	260,153,000us-gaap_AssetsCurrent
Deferred Finance Costs, Noncurrent, Net	696,000	695,000
Total assets	962,179,000us-gaap_Assets	1,367,605,000us-gaap_Assets
Short-term debt and current portion of long-term debt	165,357,000	22,706,000
Related party payables	55,713,000us-gaap_DueToRelatedPartiesCurrent	11,419,000us-gaap_DueToRelatedPartiesCurrent
Accounts Payable, Trade, Current	3,098,000us-gaap_AccountsPayableTradeCurrent	13,302,000us-gaap_AccountsPayableTradeCurrent
Accrued Liabilities, Current	22,445,000us-gaap_AccruedLiabilitiesCurrent	33,401,000us-gaap_AccruedLiabilitiesCurrent
Other current liabilities	2,496,000us-gaap_OtherLiabilitiesCurrent	2,916,000us-gaap_OtherLiabilitiesCurrent
Total current liabilities	328,588,000us-gaap_LiabilitiesCurrent	130,772,000us-gaap_LiabilitiesCurrent
Long-term debt	27,500,000us-gaap_LongTermDebtNoncurrent	436,372,000us-gaap_LongTermDebtNoncurrent
Related party payables	109,952,000us-gaap_DueToRelatedPartiesNoncurrent	72,598,000us-gaap_DueToRelatedPartiesNoncurrent
Other long-term liabilities	2,096,000us-gaap_OtherLiabilitiesNoncurrent	2,208,000us-gaap_OtherLiabilitiesNoncurrent
Liabilities	1,032,828,000us-gaap_Liabilities	1,385,656,000us-gaap_Liabilities
Common Stock, Value, Issued	112,343,000us-gaap_CommonStockValue	86,512,000us-gaap_CommonStockValue
Additional paid in capital	244,018,000	149,985,000
Contributed surplus	474,129,000us-gaap_OtherAdditionalCapital	474,129,000us-gaap_OtherAdditionalCapital
Accumulated other comprehensive loss	(4,258,000)	(3,303,000)	(4,155,000)	(4,779,000)
Retained deficit	(897,213,000)	(734,275,000)
Stockholders' Equity Attributable to Parent	(70,981,000)us-gaap_StockholdersEquity	(26,952,000)us-gaap_StockholdersEquity
Liabilities and Equity	962,179,000	1,367,605,000
Parent [Member]
Cash and Cash Equivalents, at Carrying Value	1,669,000	6,568,000	30,600,000	83,830,000
Restricted Cash and Cash Equivalents, Current	445,000	1,728,000
Fair value	2,516,000	3,373,000
Trade accounts receivable, net	0	18,000
Due from Related Parties, Current	0	487,000
Other Receivables	1,635,000	2,299,000
Prepaid expenses and accrued income	152,000	168,000
Total current assets	6,417,000	14,641,000
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	182,651,000	239,441,000
Deferred Finance Costs, Noncurrent, Net	153,000	696,000
Total assets	189,221,000	254,778,000
Short-term debt and current portion of long-term debt	136,700,000	0
Related party payables	11,031,000	6,017,000
Accounts Payable, Trade, Current	325,000	279,000
Accrued Liabilities, Current	1,837,000	2,487,000
Other current liabilities	196,000	268,000
Total current liabilities	150,089,000	9,051,000
Long-term debt	0	200,000,000
Related party payables	109,952,000	72,610,000
Other long-term liabilities	161,000	69,000
Liabilities	260,202,000	281,730,000
Common Stock, Value, Issued	112,343,000	86,512,000
Additional paid in capital	244,018,000	149,985,000
Contributed surplus	474,129,000	474,129,000
Accumulated other comprehensive loss	(4,258,000)	(3,303,000)
Retained deficit	(897,213,000)	(734,275,000)
Stockholders' Equity Attributable to Parent	(70,981,000)	(26,952,000)
Liabilities and Equity	$ 189,221,000	$ 254,778,000

Carrying amount as of the balance sheet date of expenditures made, not otherwise specified in the taxonomy, in advance of the timing of recognition of expenses which are expected to be charged against earnings within one year or the normal operating cycle, if longer. And, aggregate carrying amount, as of the balance sheet date, of fees and other revenue recorded based on estimates or specific contractual terms as transactions occur or services are rendered in the current period.

No definition available.