Condensed Consolidating Statement Of Cash Flows (Details) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended
	Jun. 30, 2016	Mar. 31, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Condensed Consolidating Financial Statements [Line Items]
Net cash provided (used) by operating activities		$ (21,380)		$ 27,861	$ 42,543
CASH FLOWS FROM INVESTING ACTIVITIES:
Investment in property and equipment				(10,912)	(14,554)
Proceeds from sales of assets				1,700	6,283
Acquisitions of real estate				(25,389)	0
Contributions to equity method investments				(19,688)	(2,446)
Distributions from equity method investments				3,619	270
Purchases of investments, employee benefit plans				(1,140)	(1,736)
Proceeds from sales of investments, employee benefit plans				1,136	1,087
Issuance of mezzanine and other notes receivable				(13,048)	(1,500)
Collections of mezzanine and other notes receivable				10,158	3,567
Advances to and investment in affiliates				0	0
Divestment in affiliates				0	0
Other items, net				(311)	(261)
Net cash used by investing activities				(53,875)	(9,290)
CASH FLOWS FROM FINANCING ACTIVITIES:
Net borrowings pursuant to revolving credit facilities				87,950	13,000
Principal payments on long-term debt				(623)	(6,169)
Purchases of treasury stock				(28,278)	(6,244)
Dividends paid				(23,193)	(22,940)
Proceeds from contributions from affiliates				0	0
Distributions to affiliates				0	0
Proceeds from exercise of stock options	$ 100		$ 100	4,234	5,696
Net cash provided (used) by financing activities		62,627		40,090	(16,657)
Net change in cash and cash equivalents				14,076	16,596
Effect of foreign exchange rate changes on cash and cash equivalents				371	(825)
Cash and cash equivalents at beginning of period		193,441		193,441	214,879
Cash and cash equivalents at end of period	207,888		230,650	207,888	230,650
Parent
Condensed Consolidating Financial Statements [Line Items]
Net cash provided (used) by operating activities				(34,467)	25,952
CASH FLOWS FROM INVESTING ACTIVITIES:
Investment in property and equipment				(6,427)	(11,351)
Proceeds from sales of assets				0	29
Acquisitions of real estate				0
Contributions to equity method investments				0	0
Distributions from equity method investments				0	0
Purchases of investments, employee benefit plans				0	0
Proceeds from sales of investments, employee benefit plans				0	0
Issuance of mezzanine and other notes receivable				(5,306)	(1,500)
Collections of mezzanine and other notes receivable				10,158	3,567
Advances to and investment in affiliates				0	0
Divestment in affiliates				0	0
Other items, net				(322)	(261)
Net cash used by investing activities				(1,897)	(9,516)
CASH FLOWS FROM FINANCING ACTIVITIES:
Net borrowings pursuant to revolving credit facilities				88,000	13,000
Principal payments on long-term debt				0	(5,625)
Purchases of treasury stock				(28,278)	(6,244)
Dividends paid				(23,193)	(22,940)
Proceeds from contributions from affiliates				0	0
Distributions to affiliates				0	0
Proceeds from exercise of stock options				4,234	5,696
Net cash provided (used) by financing activities				40,763	(16,113)
Net change in cash and cash equivalents				4,399	323
Effect of foreign exchange rate changes on cash and cash equivalents				0	0
Cash and cash equivalents at beginning of period		13,529		13,529	25,290
Cash and cash equivalents at end of period	17,928		25,613	17,928	25,613
Guarantor Subsidiaries
Condensed Consolidating Financial Statements [Line Items]
Net cash provided (used) by operating activities				45,562	(893)
CASH FLOWS FROM INVESTING ACTIVITIES:
Investment in property and equipment				(4,261)	(3,187)
Proceeds from sales of assets				0	4,661
Acquisitions of real estate				0
Contributions to equity method investments				(19,648)	(1,659)
Distributions from equity method investments				0	0
Purchases of investments, employee benefit plans				(1,140)	(1,736)
Proceeds from sales of investments, employee benefit plans				1,136	1,087
Issuance of mezzanine and other notes receivable				0	0
Collections of mezzanine and other notes receivable				0	0
Advances to and investment in affiliates				(25,816)	(35)
Divestment in affiliates				5,298	2,122
Other items, net				0	0
Net cash used by investing activities				(44,431)	1,253
CASH FLOWS FROM FINANCING ACTIVITIES:
Net borrowings pursuant to revolving credit facilities				0	0
Principal payments on long-term debt				(368)	(356)
Purchases of treasury stock				0	0
Dividends paid				0	0
Proceeds from contributions from affiliates				0	0
Distributions to affiliates				0	0
Proceeds from exercise of stock options				0	0
Net cash provided (used) by financing activities				(368)	(356)
Net change in cash and cash equivalents				763	4
Effect of foreign exchange rate changes on cash and cash equivalents				0	0
Cash and cash equivalents at beginning of period		19		19	25
Cash and cash equivalents at end of period	782		29	782	29
Non-Guarantor Subsidiaries
Condensed Consolidating Financial Statements [Line Items]
Net cash provided (used) by operating activities				16,766	18,141
CASH FLOWS FROM INVESTING ACTIVITIES:
Investment in property and equipment				(224)	(16)
Proceeds from sales of assets				1,700	1,593
Acquisitions of real estate				(25,389)
Contributions to equity method investments				(40)	(787)
Distributions from equity method investments				3,619	270
Purchases of investments, employee benefit plans				0	0
Proceeds from sales of investments, employee benefit plans				0	0
Issuance of mezzanine and other notes receivable				(7,742)	0
Collections of mezzanine and other notes receivable				0	0
Advances to and investment in affiliates				0	0
Divestment in affiliates				0	0
Other items, net				11	0
Net cash used by investing activities				(28,065)	1,060
CASH FLOWS FROM FINANCING ACTIVITIES:
Net borrowings pursuant to revolving credit facilities				(50)	0
Principal payments on long-term debt				(255)	(188)
Purchases of treasury stock				0	0
Dividends paid				0	(657)
Proceeds from contributions from affiliates				25,816	35
Distributions to affiliates				(5,298)	(2,122)
Proceeds from exercise of stock options				0	0
Net cash provided (used) by financing activities				20,213	(2,932)
Net change in cash and cash equivalents				8,914	16,269
Effect of foreign exchange rate changes on cash and cash equivalents				371	(825)
Cash and cash equivalents at beginning of period		179,893		179,893	189,564
Cash and cash equivalents at end of period	189,178		205,008	189,178	205,008
Eliminations
Condensed Consolidating Financial Statements [Line Items]
Net cash provided (used) by operating activities				0	(657)
CASH FLOWS FROM INVESTING ACTIVITIES:
Investment in property and equipment				0	0
Proceeds from sales of assets				0	0
Acquisitions of real estate				0
Contributions to equity method investments				0	0
Distributions from equity method investments				0	0
Purchases of investments, employee benefit plans				0	0
Proceeds from sales of investments, employee benefit plans				0	0
Issuance of mezzanine and other notes receivable				0	0
Collections of mezzanine and other notes receivable				0	0
Advances to and investment in affiliates				25,816	35
Divestment in affiliates				(5,298)	(2,122)
Other items, net				0	0
Net cash used by investing activities				20,518	(2,087)
CASH FLOWS FROM FINANCING ACTIVITIES:
Net borrowings pursuant to revolving credit facilities				0	0
Principal payments on long-term debt				0	0
Purchases of treasury stock				0	0
Dividends paid				0	657
Proceeds from contributions from affiliates				(25,816)	(35)
Distributions to affiliates				5,298	2,122
Proceeds from exercise of stock options				0	0
Net cash provided (used) by financing activities				(20,518)	2,744
Net change in cash and cash equivalents				0	0
Effect of foreign exchange rate changes on cash and cash equivalents				0	0
Cash and cash equivalents at beginning of period		$ 0		0	0
Cash and cash equivalents at end of period	$ 0		$ 0	$ 0	$ 0