Consolidated Statement of Changes in Equity and Income - USD ($) $ in Thousands	Comprehensive Income Select	Comprehensive Income	Common Stock Select	Common Stock	Capital in Excess of Par Select	Capital in Excess of Par	Retained Earnings (Accumulated Deficit) Select	Retained Earnings (Accumulated Deficit)	Non-controlling Interests Select	Non-controlling Interests	Select	Total
Balance at Dec. 31, 2012			$ 0	$ 141	$ 859,839	$ 473,697	$ 21,478	$ 243,210	$ 28,430	$ 28,430	$ 909,747	$ 745,478
Balance (in shares) at Dec. 31, 2012			0	140,589,000
Increase (Decrease) in Stockholders' Equity
Net income	$ 122,136	$ 119,946					116,580	114,390	5,556	5,556	122,136	119,946
Net income (loss) attributable to redeemable non-controlling interests	3,063	3,063										(3,063)
Total comprehensive income	125,199	123,009
Federal tax benefit of losses contributed by Holdings					1,179						1,179
Net change in dividends payable to Holdings							5,239				5,239
Additional investment by Holdings					1,525						1,525
Dividends declared and paid to Holdings							(226,621)				(226,621)
Dividends paid to common stockholders								(41,961)				(41,961)
Contribution related to restricted stock awards and stock option issuances by Holdings					7,033						7,033
Issuance and vesting of restricted stock						6,220						6,220
Issuance and vesting of restricted stock (in shares)				953,000
Repurchase of common shares				$ (1)		(7,524)		(4,256)				(11,781)
Repurchase of common shares (in shares)				(1,447,000)
Stock option expense						811						811
Exercise of stock options						1,525						$ 1,525
Exercise of stock options (in shares)				166,000								166,600
Distributions to non-controlling interests									(1,839)	(1,839)	(1,839)	$ (1,839)
Purchase of non-controlling interests									261	261	261	261
Other							(18)	(18)			(18)	(18)
Balance at Dec. 31, 2013			$ 0	$ 140	869,576	474,729	(83,342)	311,365	32,408	32,408	818,642	818,642
Balance (in shares) at Dec. 31, 2013			0	140,261,000
Increase (Decrease) in Stockholders' Equity
Net income	126,765	126,765					120,627	120,627	6,138	6,138	126,765	126,765
Net income (loss) attributable to redeemable non-controlling interests	1,410	1,410										(1,410)
Total comprehensive income	128,175	128,175
Additional investment by Holdings					7,355						7,355
Dividends declared and paid to Holdings							(184,100)				(184,100)
Dividends paid to common stockholders								(53,366)				(53,366)
Contribution related to restricted stock awards and stock option issuances by Holdings					12,778						12,778
Issuance and vesting of restricted stock				$ 2		12,078						12,080
Issuance and vesting of restricted stock (in shares)				1,586,000
Tax benefit from stock based awards					3,119	3,119					3,119	3,119
Repurchase of common shares				$ (12)		(76,851)		(53,871)				(130,734)
Repurchase of common shares (in shares)				(11,589,000)
Stock option expense						698						698
Exercise of stock options				$ 1		7,354						$ 7,355
Exercise of stock options (in shares)				975,000								974,969
Distributions to non-controlling interests									(2,893)	(2,893)	(2,893)	$ (2,893)
Issuance of non-controlling interest									1,693	1,693	1,693	1,693
Purchase of non-controlling interests					(7,421)	(7,421)			(1,360)	(1,360)	(8,781)	(8,781)
Other							923	923	(261)	(261)	662	662
Balance at Dec. 31, 2014			$ 0	$ 131	885,407	413,706	(145,892)	325,678	35,725	35,725	775,240	775,240
Balance (in shares) at Dec. 31, 2014			0	131,233,000
Increase (Decrease) in Stockholders' Equity
Net income	138,186	138,186					130,736	130,736	7,450	7,450	138,186	138,186
Net income (loss) attributable to redeemable non-controlling interests	(2,190)	(2,190)										2,190
Total comprehensive income	$ 135,996	$ 135,996
Additional investment by Holdings					1,649						1,649
Dividends declared and paid to Holdings							(28,956)				(28,956)
Dividends paid to common stockholders								(13,129)				(13,129)
Contribution related to restricted stock awards and stock option issuances by Holdings					13,969						13,969
Issuance and vesting of restricted stock						13,916						13,916
Issuance and vesting of restricted stock (in shares)				1,385,000
Tax benefit from stock based awards					1,846	1,846					1,846	1,846
Repurchase of common shares				$ 0		(8,168)		(7,659)				(15,827)
Repurchase of common shares (in shares)				(1,441,000)
Stock option expense						53						53
Exercise of stock options				$ 0		1,649						$ 1,649
Exercise of stock options (in shares)				183,000								183,450
Distributions to non-controlling interests									(9,732)	(9,732)	(9,732)	$ (9,732)
Non-controlling interests acquired in business combination									2,888	2,888	2,888	2,888
Issuance of non-controlling interest					1,689	1,689			12,880	12,880	14,569	14,569
Purchase of non-controlling interests					(194)	(194)			(25)	(25)	(219)	(219)
Other				$ 0	9	9	(1,010)	(1,010)	78	78	(923)	(923)
Balance at Dec. 31, 2015			$ 0	$ 131	$ 904,375	$ 424,506	$ (45,122)	$ 434,616	$ 49,264	$ 49,264	$ 908,517	$ 908,517
Balance (in shares) at Dec. 31, 2015			0	131,360,000