Condensed Consolidating Financial Statements - Condensed Consolidating Statement Of Cash Flows (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2016	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided by operating activities	$ (21,380)	$ 152,035	$ 165,079	$ 187,612
CASH FLOWS FROM INVESTING ACTIVITIES
Investment in property and equipment		(25,191)	(27,765)	(20,946)
Investment in intangible assets		(2,580)	(733)	(636)
Business acquisitions, net of cash acquired		(1,341)	(13,269)	0
Acquisitions of real estate		(28,583)	(9,200)	0
Proceeds from sale of assets		11,462	6,347	15,612
Contributions to equity method investments		(34,661)	(23,737)	(17,789)
Distributions from equity method investments		3,700	518	0
Issuance of mezzanine and other notes receivable		(32,604)	(36,884)	(3,340)
Collections of mezzanine and other notes receivable		11,070	4,849	11,289
Purchases of investments, employee benefit plans		(1,661)	(3,220)	(2,794)
Proceeds from sales of investments, employee benefit plans		1,911	3,170	964
Other items, net		11	114	(6)
Net cash used in investing activities		(98,467)	(99,810)	(17,646)
CASH FLOWS FROM FINANCING ACTIVITIES
Net borrowings (repayments) pursuant to revolving credit facilities		25,795	158,867	0
Principal payments on long-term debt		(988)	(130,501)	(10,108)
Proceeds from the issuance of long-term debt		0	176	250
Purchase of treasury stock		(35,926)	(72,873)	(77,972)
Proceeds from exercise of stock options		12,951	7,056	10,098
Debt issuance costs		(284)	(2,169)	0
Dividends paid		(46,182)	(45,214)	(43,529)
Net cash used in financing activities	62,627	(44,084)	(84,658)	(121,261)
Net change in cash and cash equivalents		9,484	(19,389)	48,705
Effect of foreign exchange rate changes on cash and cash equivalents		(462)	(2,049)	(1,621)
Cash and cash equivalents at beginning of period	193,441	193,441	214,879	167,795
Cash and cash equivalents at end of period		202,463	193,441	214,879
Parent
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided by operating activities		63,838	100,755	141,037
CASH FLOWS FROM INVESTING ACTIVITIES
Investment in property and equipment		(21,338)	(20,242)	(11,234)
Investment in intangible assets		(680)	(619)	(594)
Business acquisitions, net of cash acquired		0	0
Acquisitions of real estate		0	(319)
Proceeds from sale of assets		0	93	27
Contributions to equity method investments		0	0	0
Distributions from equity method investments		0	0
Issuance of mezzanine and other notes receivable		(8,382)	(12,753)	(3,340)
Collections of mezzanine and other notes receivable		11,070	4,849	11,289
Purchases of investments, employee benefit plans		0	0	0
Proceeds from sales of investments, employee benefit plans		0	0	0
Advances to and investments in affiliates		0	0	(1,000)
Divestment in affiliates		0	0	0
Other items, net		100	49	98
Net cash used in investing activities		(19,230)	(28,942)	(4,754)
CASH FLOWS FROM FINANCING ACTIVITIES
Net borrowings (repayments) pursuant to revolving credit facilities		26,000	159,000
Principal payments on long-term debt		0	(129,374)	(9,375)
Proceeds from the issuance of long-term debt		0	0	0
Purchase of treasury stock		(35,926)	(72,873)	(77,972)
Proceeds from other debt agreements		0
Proceeds from exercise of stock options		12,951	7,056	10,098
Debt issuance costs		(284)	(2,169)
Proceeds from contributions from affiliates		0	0	0
Distributions to affiliates		0	0	0
Dividends paid		(46,182)	(45,214)	(43,529)
Net cash used in financing activities		(43,441)	(83,574)	(120,778)
Net change in cash and cash equivalents		1,167	(11,761)	15,505
Effect of foreign exchange rate changes on cash and cash equivalents		0	0	0
Cash and cash equivalents at beginning of period	13,529	13,529	25,290	9,785
Cash and cash equivalents at end of period		14,696	13,529	25,290
Guarantor Subsidiaries
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided by operating activities		53,468	23,814	24,521
CASH FLOWS FROM INVESTING ACTIVITIES
Investment in property and equipment		(2,554)	(6,952)	(9,134)
Investment in intangible assets		(1,900)	0	0
Business acquisitions, net of cash acquired		0	0
Acquisitions of real estate		0	0
Proceeds from sale of assets		0	4,661	516
Contributions to equity method investments		(34,593)	(22,205)	(11,390)
Distributions from equity method investments		0	0
Issuance of mezzanine and other notes receivable		0	0	0
Collections of mezzanine and other notes receivable		0	0	0
Purchases of investments, employee benefit plans		(1,661)	(3,220)	(2,794)
Proceeds from sales of investments, employee benefit plans		1,911	3,170	964
Advances to and investments in affiliates		(29,327)	(9,418)	(5,578)
Divestment in affiliates		15,226	10,735	3,426
Other items, net		0	(49)	0
Net cash used in investing activities		(52,898)	(23,278)	(23,990)
CASH FLOWS FROM FINANCING ACTIVITIES
Net borrowings (repayments) pursuant to revolving credit facilities		0	0
Principal payments on long-term debt		(430)	(718)	(701)
Proceeds from the issuance of long-term debt		0	176	176
Purchase of treasury stock		0	0	0
Proceeds from other debt agreements		0
Proceeds from exercise of stock options		0	0	0
Debt issuance costs		0	0
Proceeds from contributions from affiliates		0	0	0
Distributions to affiliates		0	0	0
Dividends paid		0	0	0
Net cash used in financing activities		(430)	(542)	(525)
Net change in cash and cash equivalents		140	(6)	6
Effect of foreign exchange rate changes on cash and cash equivalents		0	0	0
Cash and cash equivalents at beginning of period	19	19	25	19
Cash and cash equivalents at end of period		159	19	25
Non-Guarantor Subsidiaries
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided by operating activities		35,386	41,167	22,711
CASH FLOWS FROM INVESTING ACTIVITIES
Investment in property and equipment		(1,299)	(571)	(578)
Investment in intangible assets		0	(114)	(42)
Business acquisitions, net of cash acquired		(1,341)	(13,269)
Acquisitions of real estate		(28,583)	(8,881)
Proceeds from sale of assets		11,462	1,593	15,069
Contributions to equity method investments		(68)	(1,532)	(6,399)
Distributions from equity method investments		3,700	518
Issuance of mezzanine and other notes receivable		(24,222)	(24,131)	0
Collections of mezzanine and other notes receivable		0	0	0
Purchases of investments, employee benefit plans		0	0	0
Proceeds from sales of investments, employee benefit plans		0	0	0
Advances to and investments in affiliates		0	0	0
Divestment in affiliates		0	0	0
Other items, net		(89)	114	(104)
Net cash used in investing activities		(40,440)	(46,273)	7,946
CASH FLOWS FROM FINANCING ACTIVITIES
Net borrowings (repayments) pursuant to revolving credit facilities		(205)	(133)
Principal payments on long-term debt		(558)	(409)	(32)
Proceeds from the issuance of long-term debt		0	0	74
Purchase of treasury stock		0	0	0
Proceeds from other debt agreements		550
Proceeds from exercise of stock options		0	0	0
Debt issuance costs		0	0
Proceeds from contributions from affiliates		29,327	9,418	6,578
Distributions to affiliates		(15,226)	(10,735)	(3,426)
Dividends paid		(657)	(657)	(657)
Net cash used in financing activities		13,231	(2,516)	2,537
Net change in cash and cash equivalents		8,177	(7,622)	33,194
Effect of foreign exchange rate changes on cash and cash equivalents		(462)	(2,049)	(1,621)
Cash and cash equivalents at beginning of period	179,893	179,893	189,564	157,991
Cash and cash equivalents at end of period		187,608	179,893	189,564
Consolidated
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided by operating activities		152,035	165,079	187,612
CASH FLOWS FROM INVESTING ACTIVITIES
Investment in property and equipment		(25,191)	(27,765)	(20,946)
Investment in intangible assets		(2,580)	(733)	(636)
Business acquisitions, net of cash acquired		(1,341)	(13,269)
Acquisitions of real estate		(28,583)	(9,200)
Proceeds from sale of assets		11,462	6,347	15,612
Contributions to equity method investments		(34,661)	(23,737)	(17,789)
Distributions from equity method investments		3,700	518
Issuance of mezzanine and other notes receivable		(32,604)	(36,884)	(3,340)
Collections of mezzanine and other notes receivable		11,070	4,849	11,289
Purchases of investments, employee benefit plans		(1,661)	(3,220)	(2,794)
Proceeds from sales of investments, employee benefit plans		1,911	3,170	964
Advances to and investments in affiliates		0	0	0
Divestment in affiliates		0	0	0
Other items, net		11	114	(6)
Net cash used in investing activities		(98,467)	(99,810)	(17,646)
CASH FLOWS FROM FINANCING ACTIVITIES
Net borrowings (repayments) pursuant to revolving credit facilities		25,795	158,867
Principal payments on long-term debt		(988)	(130,501)	(10,108)
Proceeds from the issuance of long-term debt		0	176	250
Purchase of treasury stock		(35,926)	(72,873)	(77,972)
Proceeds from other debt agreements		550
Proceeds from exercise of stock options		12,951	7,056	10,098
Debt issuance costs		(284)	(2,169)
Proceeds from contributions from affiliates		0	0	0
Distributions to affiliates		0	0	0
Dividends paid		(46,182)	(45,214)	(43,529)
Net cash used in financing activities		(44,084)	(84,658)	(121,261)
Net change in cash and cash equivalents		9,484	(19,389)	48,705
Effect of foreign exchange rate changes on cash and cash equivalents		(462)	(2,049)	(1,621)
Cash and cash equivalents at beginning of period	193,441	193,441	214,879	167,795
Cash and cash equivalents at end of period		202,463	193,441	214,879
Eliminations
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided by operating activities		(657)	(657)	(657)
CASH FLOWS FROM INVESTING ACTIVITIES
Investment in property and equipment		0	0	0
Investment in intangible assets		0	0	0
Business acquisitions, net of cash acquired		0	0
Acquisitions of real estate		0	0
Proceeds from sale of assets		0	0	0
Contributions to equity method investments		0	0	0
Distributions from equity method investments		0	0
Issuance of mezzanine and other notes receivable		0	0	0
Collections of mezzanine and other notes receivable		0	0	0
Purchases of investments, employee benefit plans		0	0	0
Proceeds from sales of investments, employee benefit plans		0	0	0
Advances to and investments in affiliates		29,327	9,418	6,578
Divestment in affiliates		(15,226)	(10,735)	(3,426)
Other items, net		0	0	0
Net cash used in investing activities		14,101	(1,317)	3,152
CASH FLOWS FROM FINANCING ACTIVITIES
Net borrowings (repayments) pursuant to revolving credit facilities		0	0
Principal payments on long-term debt		0	0	0
Proceeds from the issuance of long-term debt		0	0	0
Purchase of treasury stock		0	0	0
Proceeds from other debt agreements		0
Proceeds from exercise of stock options		0	0	0
Debt issuance costs		0	0
Proceeds from contributions from affiliates		(29,327)	(9,418)	(6,578)
Distributions to affiliates		15,226	10,735	3,426
Dividends paid		657	657	657
Net cash used in financing activities		(13,444)	1,974	(2,495)
Net change in cash and cash equivalents		0	0	0
Effect of foreign exchange rate changes on cash and cash equivalents		0	0	0
Cash and cash equivalents at beginning of period	$ 0	0	0	0
Cash and cash equivalents at end of period		$ 0	$ 0	$ 0