Parent Company Financial Information (Condensed Balance Sheets) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Assets
Interest-earning deposits	$ 14,531	$ 389,353
Total cash and cash equivalents	179,561	513,926	294,289	514,130
Other assets	217,289	113,967
Total Assets	7,161,582	4,906,335
Liabilities and Shareholders’ Equity
Other liabilities	87,252	68,598
Total liabilities	6,108,333	4,142,327
Shareholders’ equity	1,053,249	764,008	759,338	706,878
Total liabilities and shareholders' equity	7,161,582	4,906,335
Parent [Member]
Assets
Cash and due from banking subsidiaries	3,006	1,729
Interest-earning deposits	50,678	84,915
Total cash and cash equivalents	53,684	86,644	75,234	159,173
Other assets	1,952	649
Total Assets	1,053,675	764,267
Liabilities and Shareholders’ Equity
Other liabilities	426	259
Total liabilities	426	259
Shareholders’ equity	1,053,249	764,008
Total liabilities and shareholders' equity	1,053,675	764,267
Banking Subsidiaries [Member] | Parent [Member]
Assets
Investment in subsidiaries	993,002	676,974
Other Subsidiaries [Member] | Parent [Member]
Assets
Investment in subsidiaries	$ 5,037	$ 0