Stock-Based Compensation (Nonvested Stock Awards) (Details)				6 Months Ended	12 Months Ended
	Dec. 14, 2015 shares	Sep. 28, 2015 shares	Mar. 30, 2015 shares	Dec. 31, 2015 shares	Dec. 31, 2015 $ / shares shares	Dec. 31, 2014 $ / shares shares	Dec. 31, 2013 $ / shares shares	Mar. 31, 2013 employee	Sep. 30, 2012 employee
Performance-based restricted stock units [Member]
Summary of nonvested stock awards granted
Number of Shares Granted (shares) | shares					2,564,698
Weighted Average Grant Date Fair Value (usd per share) | $ / shares					$ 4.00	$ 6.29	$ 5.86
Employee Group 1 [Member]
Summary of nonvested stock awards granted
Vesting Period					3 years
Employee Group 1 [Member] | 2008 Equity Incentive Plan [Member] | Performance-based restricted stock units [Member]
Summary of nonvested stock awards granted
Number of Shares Granted (shares) | shares	45,000	1,123,333	1,325,000	1,168,333	2,493,333	120,000	599,875
Vesting Period					2 years	3 years	3 years
Weighted Average Grant Date Fair Value (usd per share) | $ / shares					$ 3.99	$ 6.36	$ 5.82
Director Group 1 [Member]
Summary of nonvested stock awards granted
Vesting Period					1 year
Director Group 1 [Member] | 2008 Equity Incentive Plan [Member] | Performance-based restricted stock units [Member]
Summary of nonvested stock awards granted
Number of Shares Granted (shares) | shares					4,273	51,276	75,490
Weighted Average Grant Date Fair Value (usd per share) | $ / shares					$ 4.02	$ 6.45	$ 5.67
Director Group 1 [Member] | 2008 Equity Incentive Plan [Member] | Performance-based restricted stock units [Member] | Maximum [Member]
Summary of nonvested stock awards granted
Vesting Period					1 year	1 year	1 year
Director Group 2 [Member] | 2008 Equity Incentive Plan [Member] | Performance-based restricted stock units [Member]
Summary of nonvested stock awards granted
Number of Shares Granted (shares) | shares					17,092		17,092
Vesting Period					3 years		3 years
Weighted Average Grant Date Fair Value (usd per share) | $ / shares					$ 3.99		$ 6.83
Employee inducement [Member] | 2008 Equity Incentive Plan [Member] | Performance-based restricted stock units [Member]
Summary of nonvested stock awards granted
Number of Shares Granted (shares) | shares					10,000	70,000	20,000
Vesting Period					3 years	3 years	3 years
Weighted Average Grant Date Fair Value (usd per share) | $ / shares					$ 5.29	$ 6.04	$ 7.14
Number of employees | employee								2	1