Note G - Accumulated Other Comprehensive Income (Details) - Changes in AOCI (Parentheticals) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended	12 Months Ended	3 Months Ended	6 Months Ended	3 Months Ended	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013 Other Comprehensive Income (Loss) [Member]	Mar. 31, 2013 Other Comprehensive Income (Loss) [Member]	Jun. 30, 2013 Other Comprehensive Income (Loss) [Member]	Dec. 31, 2012 Other Comprehensive Income (Loss) [Member]	Jun. 30, 2013 OCI Before Reclassifications [Member]	Jun. 30, 2013 OCI Before Reclassifications [Member]	Jun. 30, 2013 Amounts Reclassified from AOCI [Member]	Jun. 30, 2013 Amounts Reclassified from AOCI [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Tax	$ 1,733	$ 627	$ 1,406	$ 1,072	$ 3,219	$ 3,235	$ 3,219	$ 2,592	$ (12)	$ 639	$ 1	$ 8