Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Cash flows from operating activities:
Net loss	$ (136,319)us-gaap_NetIncomeLoss	$ (93,450)us-gaap_NetIncomeLoss	$ (153,294)us-gaap_NetIncomeLoss
Adjustments to reconcile net loss to net cash provided by operating activities:
Deferred income taxes	(29,864)us-gaap_DeferredIncomeTaxExpenseBenefit	(94,369)us-gaap_DeferredIncomeTaxExpenseBenefit	(96,778)us-gaap_DeferredIncomeTaxExpenseBenefit
Provision for uncollectible revenue	9,218us-gaap_ProvisionForDoubtfulAccounts	9,806us-gaap_ProvisionForDoubtfulAccounts	7,506us-gaap_ProvisionForDoubtfulAccounts
Depreciation and amortization	220,678	282,438	376,614
Post-retirement healthcare	51,337	51,035	47,692
Qualified pension	(10,129)frp_PensionExpenseNonCash	6,250frp_PensionExpenseNonCash	(42)frp_PensionExpenseNonCash
Gain on sale of discontinued operations, net	0us-gaap_GainLossOnSaleOfBusiness	(10,044)us-gaap_GainLossOnSaleOfBusiness	0us-gaap_GainLossOnSaleOfBusiness
Loss on debt refinancing	0	6,787	0
Stock-based compensation	4,274us-gaap_ShareBasedCompensation	5,807us-gaap_ShareBasedCompensation	4,055us-gaap_ShareBasedCompensation
Loss on abandoned projects	174frp_GainLossOnAbandonedProjects	201frp_GainLossOnAbandonedProjects	2,862frp_GainLossOnAbandonedProjects
Other non-cash items	1,963us-gaap_OtherNoncashIncomeExpense	(906)us-gaap_OtherNoncashIncomeExpense	(3,189)us-gaap_OtherNoncashIncomeExpense
Changes in assets and liabilities arising from operations:
Accounts receivable	8,485	(12,127)	9,587
Prepaid and other assets	(338)	(7,044)	(3,301)
Restricted cash	463	5,698	(6,164)
Accounts payable and accrued liabilities	5,068	(2,070)	3,364
Accrued interest payable	1	9,801	(332)
Other assets and liabilities, net	(3,988)	13,721	(4,198)
Reorganization adjustments:
Non-cash reorganization income	0	(980)	(5,002)
Claims payable and estimated claims accrual	(40)	(46)	(8,824)
Restricted cash—Cash Claims Reserve	80	577	22,219
Total adjustments	257,382	264,535	346,069
Net cash provided by operating activities	121,063	171,085	192,775
Cash flows from investing activities:
Net capital additions	(119,489)	(128,298)	(145,066)
Proceeds from sale of business	0	30,452	0
Distributions from investments and proceeds from the sale of property and equipment	1,126	1,895	759
Net cash used in investing activities	(118,363)	(95,951)	(144,307)
Cash flows from financing activities:
Proceeds from issuance of long-term debt	0	920,590	0
Financing costs	0us-gaap_PaymentsOfFinancingCosts	(13,217)us-gaap_PaymentsOfFinancingCosts	0us-gaap_PaymentsOfFinancingCosts
Repayments of long-term debt	(6,400)us-gaap_RepaymentsOfLongTermDebt	(961,800)us-gaap_RepaymentsOfLongTermDebt	(43,000)us-gaap_RepaymentsOfLongTermDebt
Restricted cash	0	0	1,573
Proceeds from exercise of stock options	32	55	64
Repayment of capital lease obligations	(1,445)	(1,265)	(1,252)
Net cash used in financing activities	(7,813)	(55,637)	(42,615)
Net change	(5,113)	19,497	5,853
Cash, beginning of period	42,700us-gaap_Cash	23,203us-gaap_Cash	17,350us-gaap_Cash
Cash, end of period	37,587us-gaap_Cash	42,700us-gaap_Cash	23,203us-gaap_Cash
Supplemental disclosure of cash flow information:
Interest paid, net of capitalized interest	75,520us-gaap_InterestPaidNet	64,786us-gaap_InterestPaidNet	66,619us-gaap_InterestPaidNet
Income tax paid, net of refunds	2,363us-gaap_IncomeTaxesPaidNet	1,647us-gaap_IncomeTaxesPaidNet	562us-gaap_IncomeTaxesPaidNet
Capital additions included in accounts payable, claims payable and estimated claims accrual or liabilities subject to compromise at period-end	13,120	8,067	9,501
Capital lease obligations	1,142us-gaap_CapitalLeaseObligationsIncurred	467us-gaap_CapitalLeaseObligationsIncurred	0us-gaap_CapitalLeaseObligationsIncurred
Reorganization costs paid	0frp_ReorganizationCostsPaid	324frp_ReorganizationCostsPaid	1,197frp_ReorganizationCostsPaid
Non-cash settlement of claims payable	$ 0frp_NonCashSettlementOfClaimsPayable	$ 0frp_NonCashSettlementOfClaimsPayable	$ 7,668frp_NonCashSettlementOfClaimsPayable

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- Definition

Other income (expense) included in net income that results in no cash inflows or outflows in the period. Includes noncash adjustments to reconcile net income (loss) to cash provided by (used in) operating activities that are not separately disclosed.

+ References

+ Details

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Period Type:	duration

- Definition

The cash outflow for loan and debt issuance costs.

+ References

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The cash inflow associated with the amount received from the sale of a portion of the company's business, for example a segment, division, branch or other business, during the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Investing Activities

-URI http://asc.fasb.org/extlink&oid=6516133

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 12

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3179-108585

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Name:	us-gaap_ProceedsFromDivestitureOfBusinesses
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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The cash inflow from a debt initially having maturity due after one year or beyond the operating cycle, if longer.

+ References

+ Details

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Data Type:	xbrli:monetaryItemType
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- Definition

The net cash inflow or outflow from cash and cash items that are not available for withdrawal or usage.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 14

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3255-108585

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Financing Activities

-URI http://asc.fasb.org/extlink&oid=6513228

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 15

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3291-108585

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- Definition

The cash inflow associated with the amount received from holders exercising their stock options. This item inherently excludes any excess tax benefit, which the entity may have realized and reported separately.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Financing Activities

-URI http://asc.fasb.org/extlink&oid=6513228

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (j)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 14

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3255-108585

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- Definition

Amount of expense related to write-down of receivables to the amount expected to be collected. Includes, but is not limited to, accounts receivable and notes receivable.

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- Definition

The cash outflow for the obligation for a lease meeting the criteria for capitalization (with maturities exceeding one year or beyond the operating cycle of the entity, if longer).

+ References

+ Details

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Data Type:	xbrli:monetaryItemType
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Period Type:	duration

- Definition

The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 15

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3291-108585

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Financing Activities

-URI http://asc.fasb.org/extlink&oid=6513228

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Data Type:	xbrli:monetaryItemType
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- Definition

The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method.

+ References

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Balance Type:	debit
Period Type:	duration

- Details

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Balance Type:	na
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