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Investments (HTM Fixed Income Securities by Contractual Maturity) (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Schedule of Held-to-maturity Securities [Line Items]
Due in one year or less carrying value	$ 39,376
Due after one year through five years carrying value	37,028
Due after five years through 10 years carrying value	8,432
Carrying Value	84,836	$ 101,556
Due in one year or less fair value	39,876
Due after one year through five years fair value	39,365
Due after five years through 10 years fair value	9,098
HTM, Fair Value	$ 88,339	$ 105,211

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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