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Statutory Financial Information, Capital Requirements, and Restrictions on Dividends and Transfers of Funds (Tables)

12 Months Ended

Dec. 31, 2016

Insurance [Abstract]

Schedule of Insurance Subsidiaries Statutory Surplus Data

		State of Domicile		Unassigned Surplus							Statutory Surplus						Statutory Net Income
($ in millions)				2016				2015			2016			2015			2016			2015			2014
SICA		New Jersey		$	414.4			366.6			568.6			520.8			72.2			69.6			83.9
Selective Way Insurance Company ("SWIC")		New Jersey		260.5				223.6			309.5			272.6			41.2			42.3			37.0
SICSC		Indiana		110.6				96.6			141.9			127.9			17.4			15.9			14.0
SICSE		Indiana		83.5				70.7			109.1			96.2			13.4			12.1			10.5
SICNY		New York		74.1				65.3			101.8			93.0			12.9			12.7			10.3
Selective Insurance Company of New England ("SICNE")		New Jersey		13.6				9.2			43.7			39.4			5.9			5.5			4.4
Selective Auto Insurance Company of New Jersey ("SAICNJ")		New Jersey		36.9				26.4			79.8			69.2			11.5			10.8			9.1
MUSIC		New Jersey		16.7				7.0			85.2			75.5			9.7			9.5			7.3
Selective Casualty Insurance Company ("SCIC")		New Jersey		26.6				17.8			101.0			92.3			12.6			12.1			9.6
Selective Fire and Casualty Insurance Company ("SFCIC")		New Jersey		11.3				7.5			43.2			39.4			5.5			5.3			4.2
Total				$	1,048.2			890.7			1,583.8			1,426.3			202.3			195.8			190.3

Schedule of Insurance Subsidiaries Dividend Paid To Parent

Dividends				Twelve Months ended December 31, 2016
($ in millions)		State of Domicile		Ordinary Dividends Paid
SICA		New Jersey		$	26.0
SWIC		New Jersey		12.0
SICSC		Indiana		5.0
SICSE		Indiana		2.0
SICNY		New York		5.0
SICNE		New Jersey		2.0
SAICNJ		New Jersey		1.5
SCIC		New Jersey		5.5
SFCIC		New Jersey		2.0
Total				$	61.0

Schedule of Maximum Payments Insurance Subsidiaries Of Ordinary Dividends

				2017
($ in millions)		State of Domicile		Maximum Ordinary Dividends
SICA		New Jersey		$	72.2
SWIC		New Jersey		40.4
SICSC		Indiana		13.8
SICSE		Indiana		10.9
SICNY		New York		10.2
SICNE		New Jersey		5.9
SAICNJ		New Jersey		11.5
MUSIC		New Jersey		9.7
SCIC		New Jersey		12.6
SFCIC		New Jersey		5.5
Total				$	192.7

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