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Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Statement of Financial Position [Abstract]
Amortized cost	$ 1,618,811	$ 1,718,357
Fair Value, Held-to-maturity	$ 638,950	$ 678,948
Common stock, par value	$ 0	$ 0
Common stock, authorized	225,000,000	225,000,000
Common stock, shares issued	135,516,316	140,102,480
Common stock, shares outstanding	135,516,316	140,102,480

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- Definition

Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Face amount per share of no-par value common stock.

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Fair value of investment in debt security measured at amortized cost (held-to-maturity).

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