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Investments (HTM Fixed Income Securities by Contractual Maturity) (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Schedule of Held-to-maturity Securities [Line Items]
Due in one year or less carrying value	$ 59,074
Due after one year through five years carrying value	62,778
Due after five years through 10 years carrying value	8,620
Carrying Value	130,472	$ 201,354
Due in one year or less fair value	59,671
Due after one year through five years fair value	66,622
Due after five years through 10 years fair value	9,801
HTM, Fair Value	$ 136,094	$ 209,544

X

- Definition

Amount after other than temporary impairment (OTTI) accretion, of investments in debt securities classified as held-to-maturity.

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Fair value of held-to-maturity debt securities maturing in the sixth fiscal year through the tenth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Fair value of held-to-maturity debt securities maturing in the second fiscal year through the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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