Savings Plan (Details) (USD $)	12 Months Ended					11 Months Ended	25 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 1998	Dec. 31, 1997	Dec. 31, 2014	Jan. 31, 2014
Savings Plan [Line Items]
Previous savings plan's vesting period	5 years
Charges recognized	$ 1,600,000	$ 2,600,000	$ 2,500,000
Number of common stock purchased				7,200	46,671
Amount of common stock purchased				200,000	1,000,000
Savings Plan
Savings Plan [Line Items]
Employee contribution to savings plan						0.50	1
Defined Contribution Plan Employer Employee Contribution						1	1
Maximum matching contribution						5.00%	5.00%
Percentage of enrollment of base pay	3.00%
Non Qualified Plan [Member]
Savings Plan [Line Items]
Liability under the restoration plan	$ 1,700,000	$ 2,200,000				$ 1,700,000
Liability under the restoration plan, shares	74,190	75,726				74,190