Subordinated Debentures Held by Subsidiary Trusts (Tables)

12 Months Ended

Dec. 31, 2017

Subordinated Borrowings [Abstract]

Schedule of Subordinated Borrowings

A summary of Subordinated Debenture issuances follows:

		Principal Amount Outstanding as of December 31,
Issuance	Maturity Date	2017		2016
October 2007	January 1, 2038	$	10.3	$	10.3
November 2007	December 15, 2037	15.5		15.5
December 2007	December 15, 2037	20.6		20.6
December 2007	April 1, 2038	15.5		15.5
January 2008	April 1, 2038	10.3		10.3
January 2008	April 1, 2038	10.3		10.3
Total subordinated debentures held by subsidiary trusts		$	82.5	$	82.5