Supplemental Cash Flow Information (Details) (USD $) In Thousands, unless otherwise specified	0 Months Ended	12 Months Ended
	Jun. 14, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Supplemental non-cash investing and financing activities:
Stock Issued		$ 52,711	$ 0	$ 0
Fair value of warrant liability reclassified to additional paid-in capital	14,000	0	13,973	0
Equipment acquired through capital leases		754	1,263	1,334
Exercise of stock options by common stock surrender		3,907	0	0
Supplemental cash payment information:
Interest paid		1,859	5,521	7,627
Income taxes paid (refunded)		17,783	14,049	(904)
Convertible Notes Payable [Member]
Supplemental non-cash investing and financing activities:
Value of common stock issued for debt		0	0	5,165
Term Loan [Member]
Supplemental non-cash investing and financing activities:
Value of common stock issued for debt		0	0	1,398
Preferred Stock Dividends [Member]
Supplemental non-cash investing and financing activities:
Value of common stock issued in payment of preferred stock dividends		0	0	3,254
Conversion of Preferred Stock [Member]
Supplemental non-cash investing and financing activities:
Value exchanged in conversion of preferred stock to common stock		$ 0	$ 0	$ 11,205