Discontinued Operations (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		12 Months Ended	0 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014	Mar. 11, 2014
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Discontinued Operation, Amount of Adjustment to Prior Period Gain (Loss) on Disposal, before Income Tax			$ 3,830
Revenue from discontinued operations
Provision for income taxes (including tax on gain on sale of $27,067)	0	(23,365)
Gain on sale of discontinued operation	0	65,410
Interthinx
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Percent of subsidiary stock sold				100.00%
Purchase price				151,170
Revenue from discontinued operations
Revenues from discontinued operations		11,512
Income from discontinued operations before income taxes (including gain on sale of $65,410)		54,482
Provision for income taxes (including tax on gain on sale of $27,067)		(23,365)
Income from discontinued operations, net of tax		31,117	29,177
Gain on sale of discontinued operation		65,410
Tax on sale of discontinued operation		$ 27,067