Options and Awards Options Outstanding Rollforward (Details) - $ / shares shares in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Options outstanding January 1	5,448	5,532	4,580
Weighted average exercise price January 1	$ 10.36	$ 8.51	$ 5.65
Options vested January 1	2,526	2,218	2,498
Weighted Average Exercise Price of Options Vested January 1	$ 6.35	$ 4.70	$ 3.88
Options Granted	497	637	2,058
Weighted Average Exercise Price, Options Granted	$ 19.43	$ 23.27	$ 12.68
Options Forfeited in Period	(127)	(233)	(128)
Weighted Average Exercise Price, Options Forfeited in Period	$ 14.46	$ 12.55	$ 8.14
Options Exercised in Period	(642)	(488)	(978)
Weighted Average Exercise Price, Options Exercised in Period	$ 6.47	$ 5.20	$ 3.93
Options outstanding December 31	5,176	5,448	5,532
Weighted average exercise price December 31	$ 11.62	$ 10.36	$ 8.51
Options vested December 31	2,704	2,526	2,218
Weighted Average Exercise Price of Options Vested December 31	$ 8.18	$ 6.35	$ 4.70