Stock-Based Compensation - Schedule of Deferred Stock Units Activity (Details) shares in Thousands	12 Months Ended
	Dec. 31, 2015 $ / shares shares
Deferred Stock Units
Units (in thousands)
Outstanding at January 1, 2015 (in shares) | shares	260
Granted (in shares) | shares	28
Vested and distributed (in shares) | shares	(142)
Outstanding at December 31, 2015 (in shares) | shares	146
Weighted Average Grant Date Fair Value
Outstanding at January 1, 2015 (in dollars per share) | $ / shares	$ 36.35
Granted (in dollars per share) | $ / shares	76.12
Vested and distributed (in dollars per share) | $ / shares	34.63
Outstanding at December 31, 2015 (in dollars per share) | $ / shares	$ 45.42
Restricted Stock Units (RSUs)
Units (in thousands)
Outstanding at January 1, 2015 (in shares) | shares	4,542
Granted (in shares) | shares	3,090
Vested and distributed (in shares) | shares	(2,289)
Forfeited (in shares) | shares	(274)
Outstanding at December 31, 2015 (in shares) | shares	5,069
Weighted Average Grant Date Fair Value
Outstanding at January 1, 2015 (in dollars per share) | $ / shares	$ 48.98
Granted (in dollars per share) | $ / shares	69.00
Vested and distributed (in dollars per share) | $ / shares	46.01
Forfeited (in dollars per share) | $ / shares	57.37
Outstanding at December 31, 2015 (in dollars per share) | $ / shares	$ 62.20