CONDENSED CONSOLIDATING FINANCIAL INFORMATION (Tables)

9 Months Ended

Sep. 30, 2013

Organization Consolidation And Presentation Of Financial Statements [Abstract]

Condensed Consolidating Balance Sheets

	September 30, 2013
	Parent
	Company			Guarantor
	Only (issuer)			Subsidiaries (1)		Eliminations			Consolidated
ASSETS
Current Assets:
Cash	$	598		$	1,298	$	—		$	1,896
Short-term investments		77,238			—		—			77,238
Accounts receivable – net		86,478			92,029		—			178,507
Intercompany receivable		139,531			—		(139,531	)		—
Inventories of spare parts – net		69,557			127		—			69,684
Prepaid expenses		7,611			2,373		—			9,984
Work in progress		77,921			—		—			77,921
Deferred income taxes		11,966			—		—			11,966
Income taxes receivable		1,392			231		—			1,623
Total current assets		472,292			96,058		(139,531	)		428,819
Investment in subsidiaries		110,101			—		(110,101	)		—
Property and equipment – net		581,580			200,667		—			782,247
Restricted investments		14,685			—		—			14,685
Other assets		13,172			242		—			13,414
Total assets	$	1,191,830		$	296,967	$	(249,632	)	$	1,239,165
LIABILITIES AND SHAREHOLDERS’ EQUITY
Current Liabilities:
Accounts payable	$	23,582		$	4,289	$	—		$	27,871
Accrued and other current liabilities		119,946			14,767		—			134,713
Intercompany payable		—			139,531		(139,531	)		—
Total current liabilities		143,528			158,587		(139,531	)		162,584
Long-term debt		388,265			—		—			388,265
Deferred income taxes and other long-term liabilities		117,642			28,279		—			145,921
Shareholders’ Equity:
Common stock and paid-in capital		297,754			2,674		(2,674	)		297,754
Accumulated other comprehensive loss		(43	)		—		—			(43	)
Retained earnings		244,684			107,427		(107,427	)		244,684
Total shareholders’ equity		542,395			110,101		(110,101	)		542,395
Total liabilities and shareholders’ equity	$	1,191,830		$	296,967	$	(249,632	)	$	1,239,165

(1) Foreign subsidiaries represent minor subsidiaries and are included in the guarantors’ subsidiaries amounts.

	December 31, 2012
	Parent
	Company			Guarantor
	Only (issuer)			Subsidiaries (1)		Eliminations			Consolidated
ASSETS
Current Assets:
Cash	$	552		$	2,297	$	—		$	2,849
Short-term investments		50,601			—		—			50,601
Accounts receivable – net		80,148			61,005		—			141,153
Intercompany receivable		115,300			—		(115,300	)		—
Inventories of spare parts – net		65,951			123		—			66,074
Prepaid expenses		8,354			1,783		—			10,137
Work in progress		77,764			—		—			77,764
Other current assets		988			—		—			988
Deferred income taxes		11,967			—		—			11,967
Income taxes receivable		1,395			218		—			1,613
Total current assets		413,020			65,426		(115,300	)		363,146
Investment in subsidiaries		96,706			—		(96,706	)		—
Property and equipment, net		559,686			189,815		—			749,501
Restricted investments		14,685			—		—			14,685
Other assets		19,726			836		—			20,562
Total assets	$	1,103,823		$	256,077	$	(212,006	)	$	1,147,894
LIABILITIES AND SHAREHOLDERS’ EQUITY
Current Liabilities:
Accounts payable	$	21,188		$	5,120	$	—		$	26,308
Accrued and other current liabilities		105,875			11,287		—			117,162
Intercompany payable		—			115,300		(115,300	)		—
Total current liabilities		127,063			131,707		(115,300	)		143,470
Long-term debt		386,755			—		—			386,755
Deferred income taxes and other long-term liabilities		90,390			27,664		—			118,054
Shareholders’ Equity:
Common stock and paid-in capital		297,113			2,674		(2,674	)		297,113
Accumulated other comprehensive loss		(51	)		—		—			(51	)
Retained earnings		202,553			94,032		(94,032	)		202,553
Total shareholders’ equity		499,615			96,706		(96,706	)		499,615
Total liabilities and shareholders’ equity	$	1,103,823		$	256,077	$	(212,006	)	$	1,147,894

(1) Foreign subsidiaries represent minor subsidiaries and are included in the guarantors’ subsidiaries amounts.

Condensed Consolidating Statements of Operations

	For the quarter ended September 30, 2013
	Parent
	Company			Guarantor
	Only			Subsidiaries (1)			Eliminations			Consolidated
Operating revenues, net	$	125,160		$	75,602		$	—		$	200,762
Expenses:
Direct expenses		98,669			62,062			—			160,731
Selling, general and administrative expenses		7,365			2,420			—			9,785
Management fees		(3,024	)		3,024			—			—
Total operating expenses		103,010			67,506			—			170,516
Gain on disposal of assets, net		(1,380	)		(19	)		—			(1,399	)
Equity in income of unconsolidated affiliate		(172	)		—			—			(172	)
Operating income		23,702			8,115			—			31,817
Equity in net income of consolidated subsidiaries		(4,787	)		—			4,787			—
Interest expense		7,631			137			—			7,768
Other income, net		(163	)		—			—			(163	)
		2,681			137			4,787			7,605
Earnings before income taxes		21,021			7,978			(4,787	)		24,212
Income tax expense		7,244			3,191			—			10,435
Net earnings	$	13,777		$	4,787		$	(4,787	)	$	13,777
	For the quarter ended September 30, 2012
	Parent
	Company			Guarantor
	Only			Subsidiaries (1)			Eliminations			Consolidated
Operating revenues, net	$	109,255		$	61,602		$	—		$	170,857
Expenses:
Direct expenses		92,980			48,726			—			141,706
Selling, general and administrative expenses		7,995			1,789			—			9,784
Management fees		(2,464	)		2,464			—			—
Total operating expenses		98,511			52,979			—			151,490
Gain on disposal of assets, net		701			—			—			701
Operating income		10,043			8,623			—			18,666
Equity in net income of consolidated subsidiaries		(5,174	)		—			5,174			—
Interest expense		7,488			—			—			7,488
Other income, net		(262	)		—			—			(262	)
		2,052			—			5,174			7,226
Earnings before income taxes		7,991			8,623			(5,174	)		11,440
Income tax expense		1,607			3,449			—			5,056
Net earnings	$	6,384		$	5,174		$	(5,174	)	$	6,384

(1) Foreign subsidiaries represent minor subsidiaries and are included in the guarantors’ subsidiaries amounts.

	For the nine months ended September 30, 2013
	Parent
	Company			Guarantor
	Only			Subsidiaries (1)			Eliminations			Consolidated
Operating revenues, net	$	354,453		$	220,820		$	—		$	575,273
Expenses:
Direct expenses		285,661			182,767			—			468,428
Selling, general and administrative expenses		21,719			6,356			—			28,075
Management fees		(8,833	)		8,833			—			—
Total operating expenses		298,547			197,956			—			496,503
Gain on disposal of assets, net		(16,056	)		(19	)		—			(16,075	)
Impairment of assets		—			421			—			421
Equity in loss of unconsolidated affiliate		911			—			—			911
Operating income		71,051			22,462			—			93,513
Equity in net income of consolidated subsidiaries		(13,395	)		—			13,395			—
Interest expense		22,297			137			—			22,434
Other income, net		(388	)		—			—			(388	)
		8,514			137			13,395			22,046
Earnings before income taxes		62,537			22,325			(13,395	)		71,467
Income tax expense		20,406			8,930			—			29,336
Net earnings	$	42,131		$	13,395		$	(13,395	)	$	42,131

	For the nine months ended September 30, 2012
	Parent
	Company			Guarantor
	Only			Subsidiaries (1)		Eliminations			Consolidated
Operating revenues, net	$	303,623		$	165,839	$	—		$	469,462
Expenses:
Direct expenses		260,796			133,700		—			394,496
Selling, general and administrative expenses		22,942			5,350		—			28,292
Management fees		(6,634	)		6,634		—			—
Total operating expenses		277,104			145,684		—			422,788
Gain on disposal of assets, net		11			—		—			11
Operating income		26,508			20,155		—			46,663
Equity in net income of consolidated subsidiaries		(12,086	)		—		12,086			—
Interest expense		22,116			12		—			22,128
Other income, net		(625	)		—		—			(625	)
		9,405			12		12,086			21,503
Earnings before income taxes		17,103			20,143		(12,086	)		25,160
Income tax expense		2,487			8,057		—			10,544
Net earnings	$	14,616		$	12,086	$	(12,086	)	$	14,616

(1) Foreign subsidiaries represent minor subsidiaries and are included in the guarantors’ subsidiaries amounts.

Condensed Consolidated Statements of Comprehensive Income

	For the quarter ended September 30, 2013
	Parent
	Company			Guarantor
	Only			Subsidiaries (1)		Eliminations			Consolidated
Net earnings	$	13,777		$	4,787	$	(4,787	)	$	13,777
Unrealized gain on short-term investments		37			—		—			37
Changes in pension plan assets and benefit obligations		—			—		—			—
	$	13,814		$	4,787	$	(4,787	)	$	13,814
	For the quarter ended September 30, 2012
	Parent
	Company			Guarantor
	Only			Subsidiaries (1)		Eliminations			Consolidated
Net earnings	$	6,384		$	5,174	$	(5,174	)	$	6,384
Unrealized loss on short-term investments		(18	)		—		—			(18	)
Changes in pension plan assets and benefit obligations		(2	)		—		—			(2	)
	$	6,364		$	5,174	$	(5,174	)	$	6,364

(1) Foreign subsidiaries represent minor subsidiaries and are included in the guarantors’ subsidiaries amounts.

	For the nine months ended September 30, 2013
	Parent
	Company			Guarantor
	Only			Subsidiaries (1)		Eliminations			Consolidated
Net earnings	$	42,131		$	13,395	$	(13,395	)	$	42,131
Unrealized gain on short-term investments		14			—		—			14
Changes in pension plan assets and benefit obligations		(6	)		—		—			(6	)
	$	42,139		$	13,395	$	(13,395	)	$	42,139

	For the nine months ended September 30, 2012
	Parent
	Company			Guarantor
	Only			Subsidiaries (1)		Eliminations			Consolidated
Net earnings	$	14,616		$	12,086	$	(12,086	)	$	14,616
Unrealized gain on short-term investments		49			—		—			49
Changes in pension plan assets and benefit obligations		(14	)		—		—			(14	)
	$	14,651		$	12,086	$	(12,086	)	$	14,651

(1) Foreign subsidiaries represent minor subsidiaries and are included in the guarantors’ subsidiaries amounts.

Condensed Consolidating Statements of Cash Flows

	For the nine months ended September 30, 2013
	Parent
	Company			Guarantor
	Only (issuer)			Subsidiaries (1)			Eliminations		Consolidated
Net cash provided by (used in) operating activities	$	69,104		$	(999	)	$	—	$	68,105
Investing activities:
Purchase of property and equipment		(86,092	)		—			—		(86,092	)
Proceeds from asset dispositions		39,822			—			—		39,822
Purchase of short-term investments		(314,519	)		—			—		(314,519	)
Proceeds from sale of short-term investments		287,043			—			—		287,043
Deposits returned on aircraft		6,908			—			—		6,908
Deposits paid on aircraft		(2,693	)		—			—		(2,693	)
Net cash used in investing activities		(69,531	)		—			—		(69,531	)
Financing activities:
Proceeds from line of credit		101,273			—			—		101,273
Payments on line of credit		(99,763	)		—			—		(99,763	)
Repurchase of common stock for payroll tax withholding requirements		(1,037	)		—			—		(1,037	)
Net cash provided by financing activities		473			—			—		473
Increase (decrease) in cash		46			(999	)		—		(953	)
Cash, beginning of period		552			2,297			—		2,849
Cash, end of period	$	598		$	1,298		$	—	$	1,896
	For the nine months ended September 30, 2012
	Parent
	Company			Guarantor
	Only (issuer)			Subsidiaries (1)			Eliminations		Consolidated
Net cash provided by operating activities	$	25,632		$	404		$	—	$	26,036
Investing activities:
Purchase of property and equipment		(83,187	)		—			—		(83,187	)
Proceeds from asset dispositions		9,702			—			—		9,702
Purchase of short-term investments		(167,952	)		—			—		(167,952	)
Proceeds from sale of short-term investments		194,957			—			—		194,957
Deposits returned on aircraft		5,369			—			—		5,369
Deposits paid on aircraft		(11,176	)		—			—		(11,176	)
Net cash used in investing activities		(52,287	)		—			—		(52,287	)
Financing activities:
Proceeds from line of credit		91,863			—			—		91,863
Payments on line of credit		(68,915	)		—			—		(68,915	)
Net cash provided by financing activities		22,948			—			—		22,948
(Decrease) increase in cash		(3,707	)		404			—		(3,303	)
Cash, beginning of period		4,313			778			—		5,091
Cash, end of period	$	606		$	1,182		$	—	$	1,788

(1) Foreign subsidiaries represent minor subsidiaries and are included in the guarantors’ subsidiaries amounts.