Consolidated Statements Of Equity - USD ($) shares in Thousands, $ in Thousands	Common Stock [Member]	Additional Paid-In Capital [Member]	Accumulated Deficit [Member]	Accumulated Other Comprehensive Income [Member]	Noncontrolling Shareholders' Contribution Receivable [Member]	Noncontrolling Interest [Member]	Total
Balance at Mar. 31, 2014	$ 6	$ 135,440	$ (104,579)	$ 30,529	$ 0	$ (140)	$ 61,256
Balance, Shares at Mar. 31, 2014	57,301
Net income	$ 0	0	45,441	0	0	2,315	47,756
Other comprehensive income, net of tax of nil	0	0	0	(11,686)	0	1	(11,685)
Incorporation of a majority owned subsidiary	0	0	0	0	0	284	284
Balance at Dec. 31, 2014	$ 6	135,440	(59,138)	18,843	0	2,460	97,611
Balance, Shares at Dec. 31, 2014	57,301
Balance at Mar. 31, 2015	$ 6	135,440	(35,046)	11,526	0	2,643	114,569
Balance, Shares at Mar. 31, 2015	57,301
Net income	$ 0	0	20,140	0	0	768	20,908
Other comprehensive income, net of tax of nil	0	0	0	(2,596)	0	174	(2,422)
Repurchase of noncontrolling interest	0	1,820	0	186	0	(3,491)	(1,485)
Contribution from noncontrolling shareholders	0	430	0	(186)	(3,735)	3,491	0
Shares repurchased	$ 0	(2,371)	0	0	0	0	(2,371)
Shares repurchased, Shares	(464)
Balance at Dec. 31, 2015	$ 6	$ 135,319	$ (14,906)	$ 8,930	$ (3,735)	$ 3,585	$ 129,199
Balance, Shares at Dec. 31, 2015	57,837