Income Taxes - Unrecognized Tax Benefit (Details) (USD $)	3 Months Ended	12 Months Ended
	Mar. 31, 2014	Mar. 31, 2015	Dec. 31, 2013	Dec. 31, 2012
Income Tax Disclosure [Abstract]
Expected future taxable income to fully realize the deferred tax assets		$ 76,000,000
Goodwill	800,000
Change in net deferred tax assets attributable to other comprehensive income	200,000	100,000
Domestic taxable income	0	91,017,000	151,204,000	141,660,000
Unremitted earnings of non-US subsidiaries		362,000,000
Income tax on the repatriation of all foreign earnings		118,000,000
Non-US Subsidiary Cash and Cash Equivalents		132,000,000
Percentage of pre-tax earnings from a country which does not impose a corporate income tax		25.00%
Minimum percentage used to measure tax benefit of uncertain tax position		50.00%
Unrecognized tax benefits that would impact effective tax rate		3,566,000
Reconciliation of the beginning and ending amounts of total unrecognized tax benefits
Balance at the beginning of the period	0	0	0
Gross change related to current and prior years' tax positions	0		0
Gross increase related to current year tax positions		1,293,000
Gross increase related to prior year tax positions		3,374,000
Balance at the end of the period	0	4,667,000	0	0
Tax benefits, to be settled within 12 months		300,000
Accrued interest on income tax contingencies	$ 349,000	$ 1,246,000	$ 360,000