Fair Value Measurements and Derivative Instruments (Available-For-Sale Securities) (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Debt Securities, Available-for-sale [Line Items]
Amortized cost	$ 282,350	$ 325,421
Gross unrealized gains	484	1,521
Gross unrealized losses	(8,728)	(1,148)
Debt securities	274,106	325,794
Government and related securities
Debt Securities, Available-for-sale [Line Items]
Amortized cost	36,160	31,882
Gross unrealized gains	81	157
Gross unrealized losses	(1,012)	(78)
Debt securities	35,229	31,961
Corporate debt securities
Debt Securities, Available-for-sale [Line Items]
Amortized cost	67,906	71,174
Gross unrealized gains	259	614
Gross unrealized losses	(2,998)	(355)
Debt securities	65,167	71,433
Commingled fixed income securities
Debt Securities, Available-for-sale [Line Items]
Amortized cost	1,725	1,706
Gross unrealized gains	0	16
Gross unrealized losses	(33)	0
Debt securities	1,692	1,722
Mortgage-backed / asset-backed securities
Debt Securities, Available-for-sale [Line Items]
Amortized cost	176,559	220,659
Gross unrealized gains	144	734
Gross unrealized losses	(4,685)	(715)
Debt securities	$ 172,018	$ 220,678

Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on 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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Amount, before tax, of unrealized loss in accumulated other comprehensive income (AOCI) on 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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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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Amount 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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