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Restricted Securities Available For Sale
 12 Months Ended
Dec. 31, 2015
Investments, Debt and Equity Securities [Abstract]  
Restricted Securities Available For Sale
     RESTRICTED SECURITIES AVAILABLE FOR SALE

Restricted securities available for sale consist of the following:
(In millions)
As of December 31, 2015
 
Cost
 
Gross Unrealized Gains
 
Gross Unrealized Losses
 
Estimated
Fair Value
U.S. Government and agency securities
$
21.8

 
$
—

 
$
(0.1
)
 
$
21.7

Corporate bonds
17.1

 
—

 
(0.1
)
 
17.0

Asset-backed securities
5.5

 
—

 
—

 
5.5

Mortgage-backed securities
4.1

 
—

 
—

 
4.1

Total restricted securities available for sale
$
48.5

 
$
—

 
$
(0.2
)
 
$
48.3

(In millions)
As of December 31, 2014
 
Cost
 
Gross Unrealized Gains
 
Gross Unrealized Losses
 
Estimated
Fair Value
U.S. Government and agency securities
$
28.8

 
$
0.1

 
$
(0.1
)
 
$
28.8

Corporate bonds
19.1

 
—

 
(0.1
)
 
19.0

Asset-backed securities
4.8

 
—

 
—

 
4.8

Mortgage-backed securities
0.6

 
—

 
—

 
0.6

Total restricted securities available for sale
$
53.3

 
$
0.1

 
$
(0.2
)
 
$
53.2



The fair value and gross unrealized losses for restricted securities available for sale, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position, are as follows:

(In millions)
Securities Available for Sale with Gross Unrealized Losses as of December 31, 2015
 
Less than 12 Months
 
12 Months or More
 
 
 
 
 
Estimated
Fair Value
 
Gross
Unrealized
Losses
 
Estimated
Fair Value
 
Gross
Unrealized
Losses
 
Total Estimated
Fair Value
 
Total Gross
Unrealized Losses
U.S. Government and agency securities
$
16.0

 
$
(0.1
)
 
$
0.7

 
$
—

 
$
16.7

 
$
(0.1
)
Corporate bonds
12.6

 
(0.1
)
 
1.7

 
—

 
14.3

 
(0.1
)
Asset-backed securities
5.4

 
—

 
—

 
—

 
5.4

 
—

Mortgage-backed securities
3.1

 
—

 
—

 
—

 
3.1

 
—

Total restricted securities available for sale
$
37.1

 
$
(0.2
)
 
$
2.4

 
$
—

 
$
39.5

 
$
(0.2
)
(In millions)
Securities Available for Sale with Gross Unrealized Losses as of December 31, 2014
 
Less than 12 Months
 
12 Months or More
 
 
 
 
 
Estimated
Fair Value
 
Gross
Unrealized
Losses
 
Estimated
Fair Value
 
Gross
Unrealized
Losses
 
Total Estimated
Fair Value
 
Total Gross
Unrealized Losses
U.S. Government and agency securities
$
9.3

 
$
—

 
$
2.5

 
$
(0.1
)
 
$
11.8

 
$
(0.1
)
Corporate bonds
15.3

 
(0.1
)
 
2.7

 
—

 
18.0

 
(0.1
)
Asset-backed securities
3.7

 
—

 
—

 
—

 
3.7

 
—

Total restricted securities available for sale
$
28.3

 
$
(0.1
)
 
$
5.2

 
$
(0.1
)
 
$
33.5

 
$
(0.2
)

The cost and estimated fair values of debt securities by contractual maturity were as follows (securities with multiple maturity dates are classified in the period of final maturity).  Expected maturities will differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties.
(In millions)
As of December 31,
 
2015
 
2014
 
Cost
 
Estimated Fair Value
 
Cost
 
Estimated Fair Value
Contractual Maturity
 
 
 
 
 
 
 
Within one year
$
2.6

 
$
2.6

 
$
3.8

 
$
3.8

Over one year to five years
42.5

 
42.4

 
45.1

 
45.0

Over five years to ten years
0.5

 
0.5

 
4.1

 
4.1

Over ten years
2.9

 
2.8

 
0.3

 
0.3

Total restricted securities available for sale
$
48.5

 
$
48.3

 
$
53.3

 
$
53.2