Fair Value Measurements and Derivative Instruments (Assets and Liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
ASSETS
Money market funds	$ 38,851	$ 58,817
Estimated fair value	168,301	157,979
Total assets	225,677	236,282
Liabilities
Deferred compensation obligations	13,741	16,309
Total liabilities	13,741	16,309
Money market funds
ASSETS
Money market funds	47,239	65,251
Mutual funds
ASSETS
Mutual funds	11,852	14,664
Estimated fair value	1,715	1,612
Government securities
ASSETS
Estimated fair value	13,486	15,744
Corporate debt securities
ASSETS
Estimated fair value	43,895	42,159
Mortgage-backed securities
ASSETS
Estimated fair value	89,002	90,628
Asset-backed securities
ASSETS
Estimated fair value	20,203	7,836
Level 1
ASSETS
Total assets	59,211	82,249
Liabilities
Deferred compensation obligations	0	0
Total liabilities	0	0
Level 1 | Money market funds
ASSETS
Money market funds	47,239	65,251
Level 1 | Mutual funds
ASSETS
Mutual funds	11,852	14,664
Level 1 | Government securities
ASSETS
Estimated fair value	120	2,334
Level 1 | Corporate debt securities
ASSETS
Estimated fair value	0	0
Level 1 | Mortgage-backed securities
ASSETS
Estimated fair value	0	0
Level 1 | Asset-backed securities
ASSETS
Estimated fair value	0	0
Level 2
ASSETS
Total assets	166,466	154,033
Liabilities
Deferred compensation obligations	13,741	16,309
Total liabilities	13,741	16,309
Level 2 | Money market funds
ASSETS
Money market funds	0	0
Level 2 | Mutual funds
ASSETS
Mutual funds	0	0
Level 2 | Government securities
ASSETS
Estimated fair value	13,366	13,410
Level 2 | Corporate debt securities
ASSETS
Estimated fair value	43,895	42,159
Level 2 | Mortgage-backed securities
ASSETS
Estimated fair value	89,002	90,628
Level 2 | Asset-backed securities
ASSETS
Estimated fair value	20,203	7,836
Level 3
ASSETS
Total assets	0	0
Liabilities
Deferred compensation obligations	0	0
Total liabilities	0	0
Level 3 | Money market funds
ASSETS
Money market funds	0	0
Level 3 | Mutual funds
ASSETS
Mutual funds	0	0
Level 3 | Government securities
ASSETS
Estimated fair value	0	0
Level 3 | Corporate debt securities
ASSETS
Estimated fair value	0	0
Level 3 | Mortgage-backed securities
ASSETS
Estimated fair value	0	0
Level 3 | Asset-backed securities
ASSETS
Estimated fair value	$ 0	$ 0