Accumulated Other Comprehensive Income and (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2016	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of period	$ 1,217,536	$ 1,217,536	$ 1,129,449	$ 963,808
Other comprehensive income (loss) before reclassifications		8,251	712
Amounts reclassified from accumulated other comprehensive (loss) income		95	29,675
Total other comprehensive income (loss)	19,347	8,346	30,387	(32,320)
Balance at end of period		1,403,404	1,217,536	1,129,449
Accumulated Defined Benefit Plans Adjustment [Member]
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of period	(1,425)	(1,425)	(2,525)
Other comprehensive income (loss) before reclassifications		2,468	1,012
Amounts reclassified from accumulated other comprehensive (loss) income		95	88
Total other comprehensive income (loss)		2,563	1,100
Balance at end of period		1,138	(1,425)	(2,525)
Accumulated Translation Adjustment [Member]
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of period	(659)	(659)	(513)
Other comprehensive income (loss) before reclassifications		5,783	(146)
Amounts reclassified from accumulated other comprehensive (loss) income		0	0
Total other comprehensive income (loss)		5,783	(146)
Balance at end of period		5,124	(659)	(513)
AOCI Including Portion Attributable to Noncontrolling Interest [Member]
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of period	(2,084)	(2,084)	(32,471)
Balance at end of period		6,262	(2,084)	(32,471)
J-Devices
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Other comprehensive income (loss) before reclassifications		0	(154)
Amounts reclassified from accumulated other comprehensive (loss) income		0	29,587
Total other comprehensive income (loss)		0	29,433
J-Devices | AOCI Including Portion Attributable to Noncontrolling Interest [Member]
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance at beginning of period	$ 0	0	(29,433)
Balance at end of period		$ 0	$ 0	$ (29,433)