Consolidated Statement of Changes in Equity and Income (USD $) In Thousands, unless otherwise specified	Total	Common Stock	Capital in Excess of Par	Retained Earnings	Non-controlling Interests	Select	Select Common Stock	Select Capital in Excess of Par	Select Retained Earnings	Select Non-controlling Interests
Balance at Dec. 31, 2011	$ 855,326	$ 145	$ 493,828	$ 328,882	$ 32,471	$ 1,019,093	$ 0	$ 848,844	$ 137,778	$ 32,471
Balance (in shares) at Dec. 31, 2011		145,268					0
Increase (Decrease) in Stockholders' Equity
Net income	87,388			84,714	2,674	90,971			88,297	2,674
Issuance and vesting of restricted stock	1,998	0	1,998
Issuance and vesting of restricted stock (in shares)		194
Exercise of stock options	547	0	547
Exercise of stock options (in shares)		127
Stock option expense	601		601
Repurchase of common shares	(46,790)	(5)	(27,150)	(19,635)
Repurchase of common shares (in shares)		(5,726)
Federal tax benefit of losses contributed by Holdings						1,930		1,930
Additional investment by Holdings						547		547
Dividends declared and paid to Holdings						(52,034)			(52,034)
Distributions to non-controlling interests	(1,681)				(1,681)	(1,681)				(1,681)
Other	(461)		(414)		(47)	(461)		(414)		(47)
Contribution related to restricted stock awards and stock option issuances by Holdings						2,599		2,599
Balance at Jun. 30, 2012	896,928	140	469,410	393,961	33,417	1,060,964	0	853,506	174,041	33,417
Balance (in shares) at Jun. 30, 2012		139,863					0
Balance at Mar. 31, 2012
Increase (Decrease) in Stockholders' Equity
Net income	44,816					46,662
Balance at Jun. 30, 2012	$ 896,928					$ 1,060,964	$ 0
Balance (in shares) at Jun. 30, 2012							0