Fair Value Measurements Fair Value Measurements (Summarize Changes in Level 3 Assets) (Details) (Level 3, USD $) In Thousands, unless otherwise specified	6 Months Ended	12 Months Ended
	Jun. 30, 2014	Dec. 31, 2013
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Assets, beginning balance	$ 49,634	$ 62,022
Assets, earnings	(1,347)	1,836
Assets, other comprehensive income	144	1,039
Assets, purchases	2,623	4,424
Assets, (sales)	(14,972)	(5,776)
Assets, maturities	846	12,604
Assets, transfers in	9,022	(1,307)
Assets, ending balance	44,258	49,634
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Liabilities, beginning balance	0	20
Liabilities, earnings		(4)
Liabilities, other comprehensive income		0
Liabilities, purchases		4
Liabilities, (sales)		(20)
Liabilities, maturities		0
Liabilities, transfers in		0
Liabilities, ending balance		0
Equity securities available for sale
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Assets, beginning balance	4,990	2,029
Assets, earnings	39	(299)
Assets, other comprehensive income	0	0
Assets, purchases	0	3,430
Assets, (sales)	(495)	(170)
Assets, maturities
Assets, transfers in	0	0
Assets, ending balance	4,534	4,990
Preferred stocks
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Assets, beginning balance	3,752	621
Assets, earnings	39	(299)
Assets, other comprehensive income	0	0
Assets, purchases	0	3,430
Assets, (sales)	(22)	0
Assets, maturities
Assets, transfers in	0	0
Assets, ending balance	3,769	3,752
Common stocks
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Assets, beginning balance	1,238	1,408
Assets, earnings	0	0
Assets, other comprehensive income	0	0
Assets, purchases	0	0
Assets, (sales)	(473)	(170)
Assets, maturities
Assets, transfers in	0	0
Assets, ending balance	765	1,238
Debt Securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Assets, beginning balance	42,864	59,065
Assets, earnings	43	677
Assets, other comprehensive income	144	309
Assets, purchases	84	170
Assets, (sales)	(5,247)	(4,753)
Assets, maturities	846	12,604
Assets, transfers in	0	0
Assets, ending balance	37,042	42,864
Corporate Debt Securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Assets, beginning balance	42,864	59,065
Assets, earnings	43	677
Assets, other comprehensive income	144	309
Assets, purchases	84	170
Assets, (sales)	(5,247)	(4,753)
Assets, maturities	846	12,604
Assets, transfers in	0	0
Assets, ending balance	37,042	42,864
Trading Assets, Excluding Debt and Equity Securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Assets, beginning balance	1,780	928
Assets, earnings	(1,429)	1,458
Assets, other comprehensive income	0	730
Assets, purchases	2,539	824
Assets, (sales)	(9,230)	(853)
Assets, maturities
Assets, transfers in	9,022	(1,307)
Assets, ending balance	$ 2,682	$ 1,780