Discontinued Operations (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Operating Revenues	$ 315,563	$ 309,225	$ 582,627	$ 607,074
Administrative and general	34,718	36,301	70,363	71,292
Depreciation and amortization	33,783	33,220	67,331	62,922
Total costs and expenses	308,614	314,066	578,720	587,178
Gain (Loss) on Sale of Assets and Asset Impairment Charges	12,305	3,342	14,320	7,119
Operating Income (Loss)	19,254	(1,499)	18,227	27,015
Nonoperating Income (Expense)	307	10,949	(11,486)	5,422
Income Tax Expense (Benefit)	7,975	3,250	5,322	12,710
Income (Loss) from Equity Method Investments	7,710	295	6,841	7,956
Net Income	19,296	11,299	8,049	47,672
SES Business [Member]
Operating Revenues	0	0	0	22,387
Operating Expenses	0	0	0	18,234
Administrative and general	0	567	0	4,587
Depreciation and amortization	0	0	0	1,428
Total costs and expenses	0	567	0	24,249
Gain (Loss) on Sale of Assets and Asset Impairment Charges	0	0	0	(71)
Operating Income (Loss)	0	(567)	0	(1,933)
Nonoperating Income (Expense)	0	5	(1,537)	24,971
Income Tax Expense (Benefit)	0	(197)	(538)	4,305
Income (Loss) from Equity Method Investments	0	0	0	302
Net Income	0	(365)	(999)	19,035
SEI [Member]
Operating Revenues	0	153,388	0	316,318
Operating Expenses	0	150,837	0	310,800
Administrative and general	0	1,626	0	3,136
Depreciation and amortization	0	1	0	(4)
Total costs and expenses	0	152,464	0	313,932
Operating Income (Loss)	0	924	0	2,386
Nonoperating Income (Expense)	0	1,136	(143)	5
Income Tax Expense (Benefit)	0	864	(50)	1,103
Net Income	0	1,196	(93)	1,288
Era Group [Member]
Operating Revenues	0	62,985	22,892	124,037
Operating Expenses	0	39,002	14,076	78,678
Administrative and general	0	7,195	2,653	16,872
Depreciation and amortization	0	10,464	3,875	20,094
Total costs and expenses	0	56,661	20,604	115,644
Gain (Loss) on Sale of Assets and Asset Impairment Charges	0	1,077	548	2,842
Operating Income (Loss)	0	7,401	2,836	11,235
Nonoperating Income (Expense)	0	(2,323)	(1,316)	(3,136)
Income Tax Expense (Benefit)	0	1,861	704	2,770
Income (Loss) from Equity Method Investments	0	756	65	(5,663)
Net Income	0	3,973	881	(334)
Consolidation, Eliminations [Member]
Operating Revenues	0	(31,176)	0	(55,124)
Operating Expenses	0	(31,174)	0	(55,122)
Administrative and general	0	(2)	0	(2)
Total costs and expenses	0	(31,176)	0	(55,124)
Operating Income (Loss)	$ 0	$ 0	$ 0	$ 0