Represents the number of reinsurers to which the entity has ceded a specified percentage of the aggregate face value of life insurance in-force.

No definition available.

Name:	pl_LifeInsuranceInForceConcentrationOfReinsurersNumber
Namespace Prefix:	pl_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

Represents the stated amount that is the upper retention limit per entity policy, before revision.

No definition available.

Name:	pl_ReinsuranceRetentionPolicyAmountRetainedBeforeRevision
Namespace Prefix:	pl_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Represents the amount of insurance retained by the entity on the life of any one person for certain traditional and universal life products.

No definition available.

Name:	pl_ReinsuranceRetentionPolicyAmountRetainedCertainTraditionalAndUniversalLifeProducts
Namespace Prefix:	pl_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Stated amount that is the upper retention limit per entity policy.

No definition available.

Name:	us-gaap_ReinsuranceRetentionPolicyAmountRetained
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Name:	us-gaap_ReinsuranceRetentionPolicyLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Percentage of risk reinsured on insurance products per entity policy.

No definition available.

Name:	us-gaap_ReinsuranceRetentionPolicyReinsuredRiskPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

REINSURANCE (Details) (USD $)	12 Months Ended
REINSURANCE (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2008 Single insured life	Dec. 31, 2005 Single insured life	Dec. 31, 2013 Concentrated credit risk item
REINSURANCE
Percentage of the face value of life insurance in-force reinsured	54.00%			23.00%
Life insurance in-force reinsured, concentrated number of reinsurers				3
Amount of insurance retained before revision - certain newly issued traditional life products			$ 500,000
Amount of insurance retained - certain newly issued traditional life products			1,000,000
Amount of insurance retained - certain traditional and universal life products		$ 2,000,000