Condensed Financial Information Of Parent Company Parent Company Information (Details 2) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Condensed Financial Statements, Captions [Line Items]
Investment Income, Dividend									$ 3,613	$ 1,604	$ 446
Interest Expense	14,713	13,510	11,830	2,345	2,598	2,869	3,158	3,576	42,398	12,201	19,648
Net earnings from continuing operations	71,057	62,276	11,230	25,905	3,447	24,140	4,396	13,494	170,468	45,477
Income Tax Expense (Benefit)	42,226	42,205	14,846	14,576	9,135	11,243	1,906	7,719	113,853	30,003	36,695
Net earnings	70,999	62,271	10,555	25,080	3,109	24,163	4,349	13,494	168,905	45,115	56,801
Parent Only
Condensed Financial Statements, Captions [Line Items]
Other Income									122	104	114
Acquisition Related Securities Gain									0	5,222	0
Debt Termination Income									0	0	1,597
Investment Income, Dividend									137,000	48,000	50,000
Total Income									137,122	53,326	51,711
Interest Expense									4,211	3,796	3,721
Operating Expenses									8,105	6,061	5,576
Total Expenses									12,316	9,857	9,297
Net earnings from continuing operations									124,806	43,469	42,414
Income Tax Expense (Benefit)									5,164	4,038	3,174
Income Loss From Continuing Operations Before Income Loss From Equity Method Investments									129,970	47,507	45,588
Income (Loss) from Equity Method Investments, Net of Dividends or Distributions									38,935	(2,392)	11,213
Net earnings									$ 168,905	$ 45,115	$ 56,801