Reportable Business Segments and International Operations (Details 3) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Reconciliation of segment assets to consolidated total assets
Segment assets excluding goodwill	$ 3,813,350	$ 3,005,122	$ 2,437,412
Goodwill	2,289,085	1,932,740
Other assets	65,593	277,601
Total assets	$ 6,168,028	$ 5,215,463