Supplemental Information (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Supplemental Information
Income taxes paid (refunded)	$ (478)	$ 32,142
Interest paid	1,539	1,390
Dividends declared but not paid at year end	22,500	16,579
Purchases of common stock not paid at end of period	$ 639	$ 0