Consolidated Statements of Equity (Parenthetical) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Cash dividends declared per share	$ 2.15	$ 1.98	$ 1.80
Tax effect on stock options exercised	$ 12,905	$ 11,018	$ 5,356
Common Stock [Member]
Tax effect on stock options exercised	12,905	11,018	5,356
Additional Paid-In Capital [Member]
Tax effect on stock options exercised	12,905	11,018	5,356
Retained Earnings [Member]
Cash dividends declared per share	$ 2.15	$ 1.98	$ 1.80
Total Parent Equity [Member]
Cash dividends declared per share	$ 2.15	$ 1.98	$ 1.80
Tax effect on stock options exercised	$ 12,905	$ 11,018	$ 5,356