Fair Value Measurements and Derivative Instruments (Assets and Liabilities) (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024
ASSETS
Debt securities	$ 171,229	$ 157,979
Mutual funds
ASSETS
Debt securities	1,695	1,612
Government securities
ASSETS
Debt securities	15,653	15,744
Corporate debt securities
ASSETS
Debt securities	43,769	42,159
Asset-backed securities
ASSETS
Debt securities	20,218	7,836
Recurring basis
ASSETS
Money market funds	9,218	65,251
Mortgage-backed securities	89,894	90,628
Total assets	192,738	236,282
Liabilities:
Deferred compensation obligations	15,173	16,309
Total liabilities	15,173	16,309
Recurring basis | Mutual funds
ASSETS
Debt securities	13,986	14,664
Recurring basis | Government securities
ASSETS
Debt securities	15,653	15,744
Recurring basis | Corporate debt securities
ASSETS
Debt securities	43,769	42,159
Recurring basis | Asset-backed securities
ASSETS
Debt securities	20,218	7,836
Level 1 | Recurring basis
ASSETS
Money market funds	9,218	65,251
Mortgage-backed securities	0	0
Total assets	25,605	82,249
Liabilities:
Deferred compensation obligations	0	0
Total liabilities	0	0
Level 1 | Recurring basis | Mutual funds
ASSETS
Debt securities	13,986	14,664
Level 1 | Recurring basis | Government securities
ASSETS
Debt securities	2,401	2,334
Level 1 | Recurring basis | Corporate debt securities
ASSETS
Debt securities	0	0
Level 1 | Recurring basis | Asset-backed securities
ASSETS
Debt securities	0	0
Level 2 | Recurring basis
ASSETS
Money market funds	0	0
Mortgage-backed securities	89,894	90,628
Total assets	167,133	154,033
Liabilities:
Deferred compensation obligations	15,173	16,309
Total liabilities	15,173	16,309
Level 2 | Recurring basis | Mutual funds
ASSETS
Debt securities	0	0
Level 2 | Recurring basis | Government securities
ASSETS
Debt securities	13,252	13,410
Level 2 | Recurring basis | Corporate debt securities
ASSETS
Debt securities	43,769	42,159
Level 2 | Recurring basis | Asset-backed securities
ASSETS
Debt securities	20,218	7,836
Level 3 | Recurring basis
ASSETS
Money market funds	0	0
Mortgage-backed securities	0	0
Total assets	0	0
Liabilities:
Deferred compensation obligations	0	0
Total liabilities	0	0
Level 3 | Recurring basis | Mutual funds
ASSETS
Debt securities	0	0
Level 3 | Recurring basis | Government securities
ASSETS
Debt securities	0	0
Level 3 | Recurring basis | Corporate debt securities
ASSETS
Debt securities	0	0
Level 3 | Recurring basis | Asset-backed securities
ASSETS
Debt securities	$ 0	$ 0